OPINION

Justice SAYLOR.

Appeal was allowed to review the Commonwealth Court's decision overturning the Public Utility Commission's approval of the Verizon/MCI merger.

Pursuant to Pennsylvania's Public Utility Code, 66 Pa.C.S. §§ 101- 3316, the Public Utility Commission (the "PUC" or the "Commission") is the Commonwealth administrative agency which regulates jurisdictional public utilities, including various telecommunications companies. Public utilities are obliged, under the Code, to obtain Commission approval for a proposed merger in the form of a certificate of public convenience. See 66 Pa.CS. § 1102(a)(3); see also 59 Pa. Code § 69.901. The PUC is empowered to grant such a certificate only if it finds that it is "necessary or proper for the service, accommodation, convenience, or safety of the public." 66 Pa.C.S. § 1103(a). In addition, the Commission may impose such conditions in connection with the approval as it deems to be just and reasonable. See id.

Verizon Communications, Inc. and MCI, Inc., through their subsidiaries, provide regulated telecommunications services in Pennsylvania and elsewhere. In February 2005, these companies executed an agreement and plan of merger whereby MCI would become a wholly-owned subsidiary of Verizon. The merger was driven primarily by Verizon's interest in developing a network infrastructure to enhance its position in the enterprise market (composed of large end users, such as businesses, government entities, and large institutional customers such as universities), which MCI has targeted and in which it is especially strong. The decision also took into account the general, continuing declines in Verizon's wireline and in MCI's mass market businesses. See generally Popowsky, 917 A.2d at 383 ("The merger was prompted by the nationwide decline in Verizon's and MCI's core local and long distance services caused by regulatory changes, marketplace developments and changes due to technology and the two companies' belief that they could complement each other's weaknesses while improving growth.").

The companies applied for all necessary federal and state approvals, including reviews by the United States Department of Justice ("DOJ"), the Federal Communications Commission (the "FCC"), and a number of state commissions, including the PUC. The Pennsylvania proposal did not call for any specific change in rates, terms, or conditions for any telecommunications services. Federal approvals subsequently were obtained from DOJ, see United States v. SBC Communications, Inc., 489 F.Supp.2d 1, 24 (D.D.C. 2007), and the FCC, In re Verizon Communications, Inc. and MCI, Inc., 20 F.C.C.R. 18433 (November 17, 2005), as were all necessary approvals from state regulatory bodies.

The Pennsylvania proceedings included more than thirty participants, including the Office of Consumer Advocate (the "OCA" or the "Consumer Advocate"), which filed a timely protest. The OCA's central position was that, under this Court's decision in City of York v. PUC, 449 Pa. 136,

295 A.2d 825 (1972), Pennsylvania law requires assurances that a proposed merger will provide substantial public benefit to support regulatory approval, and thus, Pennsylvania-specific conditions were necessary as a prerequisite to a certificate of public convenience. The OCA and others suggested various conditions, including: a five-year freeze on non-competitive services; provision of stand-alone, as opposed to bundled, digital subscriber line (or DSL) services; submission of a modernization plan to accelerate broadband deployment; and development of company-specific service quality measures.

An administrative law judge (the "ALJ") oversaw the development of an extensive evidentiary record. Testimony was received from various witnesses presented by the joint applicants in support of a conclusion that the merger would benefit the public. For example, one Verizon witness testified as follows:

The public interest will be promoted by [the merger] with the creation of a strong new competitor for enterprise customers nationwide and here in Pennsylvania, new investment in communications infrastructure, and further development of an advanced broadband platform.

* * *

[T]he merger will deliver benefits to customers of all types in the form of competitive prices, network improvements, and the enhanced ability for customers to purchase all of their communications needs from a single supplier. Customers also will benefit from Verizon's investment in the maintenance and improvement of MCI networks and systems, including MCI's Internet Protocol ("IP")-based backbone.

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[T]he transaction will greatly enhance the abilities that both Verizon and MCI now possess as stand-alone companies to provide a comprehensive suite of services to consumers, businesses and government customers.

R.R. at 20a-23a (Testimony of Paul B. Vasington, Director of State Public Policy for Verizon). By way of further example, an MCI witness identified similar benefits while discussing the effects of the merger on competition, as follows:

The merger will have a pro-competitive effect and will not cause competitive harm in Pennsylvania. In the enterprise market, MCI's and Verizon's networks, services, and areas of expertise are highly complementary and not overlapping. MCI is strong in the enterprise sector; Verizon is not. MCI operates a large Internet backbone network; Verizon does not. MCI has no wireless assets and offers no wireless services to enterprise customers; Verizon operates a large and successful wireless business. Thus, the combination will benefit customers by enabling the merged entity to operate at lower costs, to develop high-quality innovative services, and to deploy those services rapidly. It will bring Verizon, with all of its expertise and financial resources, into the Pennsylvania enterprise market, and the combined company will be able to offer a broader and more complete array of services than either Verizon or MCI is positioned to offer on its own. Moreover, the merged entity will not occupy a dominant position or otherwise be in any position to stifle growth in competition.

R.R. at 72a (testimony of Sally McMahon, Vice President — Consumer Affairs and Quality for MCI); see also id. at 75a (adding that the transaction "will promote domestic security by enhancing investment in the communications infrastructure that is used by the Department of Defense and Homeland Security, as well as other federal and state agencies, and ensuring that the crucial networks remain robust and technologically advanced"). A Verizon witness also explained that his company had failed to win a wide variety of bids for enterprise services due to its lack of broad-ranging, facilities-based network coverage which the combination with MCI will provide, benefiting the market by introducing additional pricing pressure and service choice to customers. See R.R. at 30a (Vasington).

The OCA presented contrary evidence, including the following testimony from a consulting economist specializing in public utility regulation:

If you look closely at how the companies characterize the alleged benefits of the proposed merger, they implicitly assume that a strengthening of Verizon's competitive position will somehow translate into public interest benefits. But, making a dominant carrier even more dominant isn't necessarily good for the public interest. Enabling Verizon to increase its market share or improve upon its already robust profits isn't self-evidently beneficial to the public, as would be an allegation that the merger will reduce concentration within the industry, make the industry more competitive, or intensify the competitive process. But, given Verizon's huge size and dominant position, there is no reason to accept the assumption that what is good for Verizon is good for its customers or the public in general. Simply stated, just because Verizon will be even bigger and stronger doesn't mean that the prospects for effective competition will improve, or that the public interest will be advanced.

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When viewed from a public interest perspective, there is no reason to assume that the public will benefit from greater efficiencies, reduced costs, increased innovation or improved quality, nor have they offered sufficient evidence to judge whether the anticipated gains in revenues will provide a substantial affirmative benefit to the public.

R.R. at 279a-281a (testimony of Ben Johnson, PhD). Along the same lines, another consultant specializing in telecommunications supporting the protests testified:

Verizon has provided no evidence to show that consumers will receive any substantial affirmative benefit — in terms of the quality of telephone service — from the merger. Verizon is careful not to say that consumers will benefit from this transaction, nor will the company offer any real assurance that the merger will improve the quality of service delivered to customers, particularly residential customers. Verizon's references to service quality are oblique, using terms like "maintaining" and "protecting," as if the company simply hopes that service will not deteriorate as a result of the merger's cost-cutting plans and reductions in the number of employees.

R.R. at 333a-334a (testimony of Rowland L. Curry, P.E.). The OCA also contended that the level of merger savings enjoyed by the resultant companies (estimated at $644 million attributable to Pennsylvania) was significant, because the Commission often has required merging utilities to pass through at least a portion of such savings to customers as a condition to merger approval.

The administrative law judge credited most of the joint applicants' evidence and recommended approval of the merger and the award of a certificate of public convenience, subject only to the conditions imposed by DOJ and the FCC. See In re Verizon Communications, Inc., A-310580F009, et. al., slip op., 2006 WL 995853, at *53-*91 (Initial Decision by ALJ Charles E. Rainey, Jr. Nov. 15, 2005) (" Initial Decision"). Preliminarily, the ALJ enumerated the various assets and strengths that each of Verizon and MCI brought to the merger, including: MCFs solid base of large enterprise customers on a national and international basis; MCI's Internet Protocol ("IP") backbone and IP-related expertise; Verizon's robust local network in key regions of the country (serving twenty-eight states and the District of Columbia); its solid regional base of residential and small to medium sized business customers; and its strong wireless investment. See id., 2006 WL 995853, at *60-*61. The ALJ found that a combined company with these assets and strengths will have the essential infrastructure to offer innovative, high-speed data and video services via a fiber-optic network and to deploy mobile IP devices, permitting customer applications and data to be accessed from any location, free from the previous availability of access only from fixed workstations. See id., 2006 WL 995853, at *61, *67. The ALJ also determined that the combined company would have the significant in-house expertise to overcome technical challenges to such mobile IP services. See id., 2006 WL 995853, at *61. According to the ALJ, the combined company also would be in a strong financial position to invest in the existing IP network at a lower-cost of capital than MCI could obtain on its own, with the result of increasing network capacity, extending network reach, and adding new capabilities to the network. In this regard, the ALJ highlighted that Verizon had committed to invest two billion dollars nationally to enhance MCI's network and information technology platforms. See id.

The ALJ further catalogued benefits to enterprise and government customers, consumers, investors, and the American economy. Although the ALJ recognized that the merger was expected to lead to some reduction in the work force, he found that the combined company would be better able to maintain higher levels of overall employment into the future than either company would have been able to do on its own. See Initial Decision, 2006 WL 995853, at *62.

In terms of competition, the ALJ determined that, after the merger is completed, competition for residential and small business customers in Pennsylvania would continue to ensue from wireline competitors (such as competitive local exchange carriers), cable telephone providers, wireless service providers (which the ALJ explained are rapidly displacing traditional wireline services), and Voice Over Internet Protocol ("VoIP") providers operating throughout the Commonwealth. See Initial Decision, 2006 WL 995853, at *62. Additionally, the ALJ found that numerous companies provide vigorous competition in the servicing of enterprise customers, both in Pennsylvania and across the country, and that Verizon and MCI themselves rarely compete directly in such market. See id., 2006 WL 995853, at *63.

Based on the above, the ALJ concluded:

Evidence of record in this proceeding establishes that the merger of Verizon and MCI will create a financially and technologically strong company capable of providing advanced telecommunications and information services that will enhance the quality of life of customers in all market sectors. The United States Department of Justice Antitrust Division (DOJ) and the Federal Communications Commission (FCC) have also thoroughly investigated the merger and have imposed conditions to ameliorate the anticompetitive effects of the merger. The evidence presented in the case before me supports approving the merger because it will provide substantial public benefits. No additional conditions beyond those imposed by the DOJ and FCC are necessary.

Initial Decision, 2006 WL 995853, at *65. Although the ALJ understood that a merger of Verizon and MCI primarily would benefit enterprise customers in the short term, see id., 2006 WL 995853, at *61, *66, he also reiterated that mass market customers would profit as well from receipt of secondary benefits of the merged company's efforts to better serve enterprise customers, such as better services from those entities and direct enhancements offered to consumers to achieve economies of scale. See id., 2006 WL 995853, at *67 (citing R.R. 38a-39a (Verizon Statement)). Supporting his conclusion that there was no anticompetitive effect of the merger on the conditions approved by DOJ and the FCC, the ALJ developed that one of the DOJ conditions was a requirement for partial divestiture of wireline connections to certain buildings in Philadelphia. See id.; see also supra note 4. The ALJ also indicated that "record evidence provides that the merger of Verizon and MCI will have little or no adverse impact on the competitive choices available to enterprise customers, other than what DOJ found," and, because MCI is not competing for mass market customers, "the merger will not eliminate a significant competitor for mass market customers." See Initial Decision, 2006 WL 995853, at *69. In answer to the OCA's argument that the merger would create a competitor which was excessively strong and dominant, the ALJ concluded:

[T]here is no evidence of record that either existing wireline companies or intermodal telecommunications companies such as wireless, cable and satellite, would be driven from the market if Verizon and MCI were to merge. As Joint Applicant witness Dr. Taylor testified, numerous companies compete against Verizon to serve small, medium size and larger enterprise customers, both in Pennsylvania and across the country. . . . There is no evidence that these or any other telecommunications providers . . . will be forced out of the market as a result of Verizon and MCI.

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For all the foregoing reasons, I do not find that there is evidence of record in this proceeding that supports going beyond the divesture required by the DOJ in its Final Judgment, which the FCC also found adequate to remove the anticompetitive effects of the merger.

Id., 2006 WL 995853, at *70. Indeed, the ALJ noted that both federal agencies had indicated that the merger will likely benefit consumers. See, e.g., id., 2006 WL 995853, at *68.

Finally, the ALJ reviewed each condition advanced by participants challenging the transaction and reiterated his conclusion that no additional conditions were necessary to render the merger consistent with the public interest in Pennsylvania. See Initial Decision, 2006 WL 995853, at *70-*90.

In response to exceptions filed by the OCA and other's, the Commission analyzed the findings of the ALJ and the corresponding objections, reviewed the record, found that the merger will affirmatively benefit the public, and approved the merger with no conditions beyond those imposed by the FCC and DOJ. See In re Verizon Communications, Inc., A-310580F0009, et al., slip op., 2006 WL 995853 (Pa.P.U.C. Jan. 11, 2006).

The Commission indicated that, in light of considerations related to market concentration, it was required to consider the competitive impacts of the merger as part of the broader public interest analysis. See In re Verizon, 2006 WL 995853, at *14. In line with the ALJ's Initial Decision, the PUC found that the merger did not substantially impact competition in the mass market in Pennsylvania due to MCI's limited ability to constrain Verizon and the availability of competitive alternatives. See id., 2006 WL 995853, at *15. Further, the Commission evaluated the application of an analytical index that measures market concentration resulting from mergers and determined that modification to the indicator was appropriate in light of market realities pertaining to the telecommunications industry in Pennsylvania. See id., 2006 WL 995853, at *41-*43. Specifically, the Commission reasoned that the relevant product market should be broadened to encompass emerging bundled telecommunications services that have arisen as viable alternatives to Verizon's wireline service and constrain its ability to exercise market power as a result of the merger. See id., 2006 WL 995853, at *43. In terms of the enterprise market, the Commission's decision incorporated the ALJ's finding that numerous companies compete against Verizon to service small, medium-sized, and large customers. Correspondingly, the Commission also reiterated the ALJ's determination that the market realities are such that the communications industry has technology-enhanced substitutes available.

Reviewing the DOJ and FCC approvals, the PUC observed that, consistent with federal mandates, the agencies also had analyzed public interest implications, including competitive effects. Specifically, the Commission highlighted that DOJ had addressed potential anticompetitive harm by requiring remedial concessions, and the FCC also had imposed conditions initially reflected in voluntary commitments and concluded that Verizon's and MCI's agreements adequately addressed concerns regarding competition and market power and bolstered the public interest in support of merger approval. See In re Verizon, 2006 WL 995853, at *6. Based on all of the above considerations, the Commission determined that additional Pennsylvania-specific conditions were not necessary to mitigate anticompetitive harm. Notably, the Commission expressly indicated that its decision in this regard was "[b]ased on our review of the Pennsylvania-specific record[.]" Id., 2006 WL 995853, at *41.

In terms of the broader assessment of public benefit, the Commission reiterated the complementary strengths brought by the joint applicants to the merger; noted the companies' limited presence in each others' markets; and accepted the litany of resultant advantages found by the ALJ. See In re Verizon, 2006 WL 995853, at *17; see also supra notes 5-8 and accompanying text. The PUC also observed that the FCC found similar public benefits, stressing the federal agency's determination that "the merger enhances national security by providing additional security, routing efficiency, and greater redundancy for vital and sensitive government communications." Id., 2006 WL 995853, at *6. In response to the OCA's request for a price freeze or cap, the Commission expressed concern that such an approach might be counterproductive to the interests of the mass market in an increasingly competitive telecommunications environment. See id., 2006 WL 995853, at *20. The PUC concluded that the better approach, consistent with that of the FCC, was to permit infrastructure enhancements, investment, research, and development to promote a competitive environment, from which mass market customers will benefit via the array of telecommunications and multimedia applications, as well as the deployment of additional wireline and wireless broadband services resulting from the merger. See id., 2006 WL 995853, at *21. Moreover, the Commission indicated that a rate cap would send improper cost signals and was not advisable on the record presented. See id. The Commission also indicated that the resultant company's ability to raise rates already is constrained by regulatory controls, which provided a sufficient statutory safeguard against undue rate increases. See id.

Finally, tracking the Initial Decision, the Commission analyzed and rejected the many objections and additional proposed conditions raised in the proceedings, frequently based on lack of necessity (or, stated otherwise, the finding of substantial public benefit in their absence) and/or negative impact of the requested conditions. See In re Verizon, 2006 WL 995853, at *22-*41. As the ALJ recommended, the award of a certificate of public convenience expressly was made conditional upon the merged companies' compliance with the federally-imposed conditions. See id., 2006 WL 995853, at *43.

Vice Chairman James H. Cawley dissented on the belief that the evidence showed that the only parties which would benefit from the merger were Verizon and MCI. See In re Verizon, 2006 WL 995853, at *44-*52 (Cawley, V.C., dissenting). In his view, absent additional conditions, the proposed merger would adversely affect the competitive structure and functions of the telecommunications services market in Pennsylvania, as well as the residential and small commercial consumers of retail telecommunications services. Therefore, the dissent would have required the merged company to utilize a portion of its cost savings to address Pennsylvania-specific service quality issues and to accelerate the universal availability of broadband services. See id., 2006 WL 995853, at*52.

The OCA filed a petition for review in the Commonwealth Court, which reversed in a divided opinion and remanded the matter to the PUC for the imposition of conditions or rejection of the merger. See Popowsky, 917 A.2d at 396-97. Like the Commission dissent, the Commonwealth Court majority found that the joint applicants failed to meet the City of York standard. See id. at 396 ("[W]e find that there was no evidence that the merger of Verizon and MCI in Pennsylvania would affirmatively promote the service, accommodation, convenience or safety of the public in some substantial way[.]"). The majority explained that previously, under traditional cost-based rate regulation, financial savings gained on account of a merger would be passed on to consumers through lower rates. See id. at 393. However, in light of statutory changes replacing the traditional framework with a new scheme of price-cap regulation, see 66 Pa.C.S. §§ 3001- 3019, the majority explained that rates for telecommunications utilities are presently governed by an inflation-based formula that gives no account for decreased costs. See Popowsky, 917 A.2d at 394. As a result, the Commonwealth Court majority expressed a concern that none of the substantial synergy savings resulting from the Verizon/MCI merger would flow through to consumers. It further reasoned that this dynamic increased the importance of examining the anticompetitive effects of the merger. See id.

With this background, the Commonwealth Court majority criticized the Commission for failing to undertake a Pennsylvania-specific analysis of the anticompetitive effects of the merger, reading the Commission's decision as merely relying on the nationally-based assessments of DOJ and the FCC. See Popowsky, 917 A.2d at 394. For this reason alone, the majority indicated that a remand was warranted. Further, the majority regarded the Commission's decision as identifying only three positive benefits flowing to the public: the ability of the companies' combined network to support creation of a platform to provide a broad array of multimedia communications services and applications; the promotion of wireline and wireless broadband services; and the continuing of Verizon's longstanding corporate presence in Pennsylvania. The majority reasoned that these benefits were illusory, however, as it found no supporting detail in the record concerning what particular multimedia services were to be provided and no evidence that any of the asserted advantages would not exist in the absence of the merger. See id. at 395-96. Finally, the majority referenced decisions from other states as supportive of its conclusion that further conditions were necessary to ensure that the merger resulted in value favorable to the public. See id. at 396 n. 28 (citing public utility decisions from Washington, Maine, Arizona and California).

President Judge Colins dissented without opinion.

In the present discretionary appeals by the Commission and Verizon ("Appellants"), they argue that the OCA mischaracterizes, and the Commonwealth Court misapplied, City of York In particular, Appellants contend that the agency's and court's construction of City of York as requiring absolute assurance of public benefit to support merger approval is inconsistent with the preponderance of the evidence standard of proof applicable to PUC findings. See generally V.J.R. Bar Corp. v. PLCB, 480 Pa. 322, 326, 390 A.2d 163, 165 (1978) (explaining that the preponderance standard is the prevailing standard of proof governing agency findings in most administrative proceedings). Verizon, in particular, emphasizes that this framework for the necessary regulatory review is no different from that pertaining to the FCC's evaluation, see In re Verizon, 20 F.C.C.R. at 18443 ("The Applicants bear the burden of proving, by a preponderance of the evidence, that the proposed transaction, on balance, serves the public interest."), which resulted in the federal agency's approval of the Verizon/MCI merger. Further, Appellants argue that nothing in Section 1103 or City of York requires that the essential public benefits must necessarily arise in the short term. Indeed, Appellants develop that City of York credited several longer-term benefits in the evaluation. See City of York, 449 Pa. at 142-43, 295 A.2d at 828-29 (affirming the approval of a merger of several Pennsylvania telecommunications providers based on substantial evidence that the merger would, inter alia, result in a stronger company, improve access to capital markets, provide comparative advantages, not adversely affect rates, and produce operating economies). The Commission vigorously defends the validity of a longer-term approach to public benefit in the present price-cap regulatory environment. The PUC also stresses that short-term rate concessions may in fact impede public benefit by forestalling the deployment of an advanced network to provide multimedia services, a capital-intensive undertaking and a concern which the Commission expressly related to the Verizon/MCI merger in its opinion.

Appellants recognize that the PUC's benefits assessment, unlike that of the FCC, is Pennsylvania-specific. They explain, however, that the extensive evidentiary record was developed with this perspective in mind, and the Commission's essential findings were properly focused upon the merger's effects in the Commonwealth. In particular, Appellants challenge the Commonwealth Court's conclusion that the Commission failed to conduct a Pennsylvania-specific analysis of the impact of the merger on competition, given that the Commission set forth its evaluation in this regard at considerable length.

More generally, Appellants assert that the intermediate appellate court distorted the nature and scope of the PUC's merger analysis by overlooking substantial evidence of record supporting the Commission's finding of public benefit and improperly reweighing the evidence that the court did recognize. The briefs of both Appellants contain a detailed treatment of the evidence including that which is summarized above, which Appellants urge amply supports the Commission's finding of substantial public benefit flowing from the merger.

The OCA, on the other hand, defends the Commonwealth Court's central conclusion that the record contains no evidence of public benefit from the merger. It is the Consumer Advocate's position that, to validly find that benefits will accrue, the PUC must determine that there are legally binding commitments in place to "ensure" them. See, e.g., Brief for Appellee at 51 ("It is the overall public interest in Pennsylvania that must be served through the assurance of some substantial public benefits." (emphasis added)). In this regard, the OCA stresses that, in deciding the City of York case, this Court used the word "will" when discussing the need for substantial affirmative public benefits. See City of York, 449 Pa. at 141, 295 A.2d at 828 (stating that the Public Utility Code "requires that the proponents of a merger demonstrate that the merger will affirmatively promote the `service, accommodation, convenience, or safety of the public' in some substantial way."). Thus, the OCA asserts that, as a matter of law, in the absence of specific conditions, the types of merger benefits that would have accrued under the former cost-based ratemaking methodology (which would have required rate reductions in recognition of synergy savings), such as economies of scale and other cost reductions, cannot be found to be substantial affirmative public benefits under the current inflation-based, price-cap ratemaking methodology (which does not require attendant rate reductions), in the absence of mandatory conditions.

The OCA also develops that, in a number of prior cases, the Commission has ensured that mergers will affirmatively promote public benefits by conditioning its approval on, for example, rate reductions, rate caps, addition of new services, and/or improvements to the Pennsylvania network infrastructure. The Consumer Advocate does not insist on rate reductions per se, but rather, suggests that some other set of conditions proposed by the various participants in the regulatory proceedings might also ensure that the required benefits actually accrue.

As to the Commission's adoption of the conditions imposed by DOJ and the FCC, the OCA characterizes this act as meaningless, since the resultant company already was required to comply with those conditions under the terms of the federal approvals. Further, the OCA suggests that the Commission improperly employed the federal conditions to absolve itself of its responsibility to assure the accrual of public benefits in Pennsylvania.

Alternatively, the Consumer Advocate contends that the asserted benefits relied upon by the Commission are not substantial. By way of example, the OCA reiterates the position of Commonwealth Court majority and the Commission dissent that Verizon's claim of network enhancement was too vague to constitute evidence of affirmative benefit, since the joint applicants do not explain what multimedia services will be offered by the merged company, make a commitment to offer those services, or state that those services would not be offered in the absence of the merger. Similarly, while the OCA recognizes Verizon's commitment to invest at least two billion dollars nationally in MCI's network after the merger, it highlights that there is no evidence that such investment will be spent in Pennsylvania. The OCA develops that, in discovery, Verizon indicated that it could not yet specify locations for capital investments or allocate merger savings to specific venues.

Finally, the OCA does not agree or disagree with the Commonwealth Court's indication that the Commission failed to conduct a Pennsylvania-specific analysis of the competitive effects of the merger. Rather, it simply contends that the Commission's finding of no anticompetitive harm amounts to nothing more than a "do no harm" standard that was abandoned in City of York, in favor of the requirement of public benefit. See City of York, 449 Pa. at 141, 295 A.2d at 828 (overruling Northern Pa. Power Co. v. PUC, 333 Pa. 265, 5 A.2d 133 (1939)).

Generally, appellate review of a PUC order is limited to determining whether a constitutional violation, an error of law, or a violation of procedure has occurred and whether the necessary findings of fact are supported by substantial evidence. See 2 Pa.C.S. § 704; Popowsky v. PUC, 589 Pa. 605, 622, 910 A.2d 38, 48 (2006). Appellants' argument that neither Section 1103 nor City of York requires legally binding assurances of public benefit raises a question of law, over which our review is plenary. The substantial evidence facet of the above review standard is also implicated by the OCA's argument, and the Commonwealth Court's holding, that the Commission's finding of public benefit lacks adequate support in the record. Substantial evidence has been defined as the amount of relevant evidence which a reasonable person would accept as adequate to support a determination. See Harmon v. Mifflin County Sch. Dist, 552 Pa. 92, 97-98, 713 A.2d 620, 623 (1998). We also bear in mind that, on account of the Commission's expertise in the utility arena, reviewing courts accord considerable deference to the agency concerning the certification process.

The City of York decision is pivotal to the resolution of the legal question involved. As developed by the Consumer Advocate, there, this Court overruled previous precedent that required regulatory approval of a merger unless it was established that the transaction would adversely affect the public. See City of York, 449 Pa. at 141, 295 A.2d at 828. In doing so, the Court relied upon the plain language of Section 1103(a)'s predecessor, which it determined "requires that the proponents of a merger demonstrate that the merger will affirmatively promote the `service, accommodation, convenience, or safety of the public' in some substantial way." Id. at 141, 295 A.2d at 828. Although the Court thus altered the standard by which regulatory approval is determined, it nevertheless affirmed the Commission's award of a certificate of public convenience authorizing the corporate consolidation of three telephone companies, on the ground that the Commission's order contained an express finding that the proposed merger would affirmatively benefit the public. See id. at 142, 295 A.2d at 828.

In developing its reasoning, the City of York Court explained that the Commission's finding of benefit was "fully supported by the record" by reference to the Commission's and the Commonwealth Court's treatment of the evidence, as follows:

[T]he Commission has given considerable thought to the positive aspects of this merger. The benefits that will ultimately accrue to the subscribers of the [relevant] service area should not be given casual recognition. In view of the greater bargaining position that the surviving company . . . would have in obtaining needed capital in the money markets, and other comparative advantages, such as lower administrative costs, improved labor market conditions, and more importantly, the elimination of the other two corporate companies . . ., the beneficiaries of this merger will certainly be the subscribers[.]

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[A vice president and director of all three companies] . . . testified that the merger would have no adverse effect on the customers of [any of the three companies], but rather there would be benefits to the customers. He testified that the merger would result in a stronger company; that investors will more likely be attracted to a larger company; that service will be improved; that some paper work and over-lapping administrative details in connection with the three companies would be eliminated; that business relations with other businesses and government agencies would be simplified. Further, he testified that the merger would be helpful in regard to labor relations and would be beneficial in the administration of tariffs, employee relations, saving of executive time and in producing economies in insurance costs. His testimony could be fairly summarized as a persuasive assertion that the merger will produce operating economies and regulatory simplification that should benefit all parties.

City of York, 449 Pa. at 142, 295 A.2d at 828-29.

Additionally, City of York rejected the merger opponents' argument that the Commission erroneously refused to consider the potential effect of the proposed merger upon utility rates. According to the Court, the PUC had not flatly refused to consider rates; rather, it merely found that the merger opponents had produced no evidence that the merger would have any detrimental effect on rates. See City of York, 449 Pa. at 136, 295 A.2d at 829. Further, the Court reasoned that the Commission's finding that the merger would result in considerable economies could only be taken as an indication of the Commission's belief that the merger would have a beneficial effect upon rates. See id. Upon this review, City of York instructed that the Commission should consider, "at least in a general fashion," the effect that a proposed merger is likely to have on future rates charged to consumers. See id.

As reflected in the above, City of York does not support the requirement advanced by the OCA, and implicit in the Commonwealth Court's decision, that the Commission must secure legally binding commitments to assure public benefit from a merger. Rather, as Appellants argue, City of York merely credited the Commission's preponderance-based finding of public benefit grounded upon the testimony of an industry professional and references to the Commission's judgment. See generally V.J.R. Bar Corp. v. PLCB, 480 Pa. 322, 326, 390 A.2d 163, 165 (1978) (explaining that the preponderance standard is the prevailing standard of proof governing the outcome in most administrative proceedings). Further, we do not read the decision as inextricably tied to the then prevailing scheme of cost-based rate regulation pertaining to telephone companies. Rather, as noted, the decision on its face merely requires consideration of rates "at least in a general fashion," or the "probable general effect of the merger upon rates," City of York, 449 Pa. at 143-44, 295 A.2d at 829, as a component of a net benefits assessment. Thus, we agree with Appellants that City of York does not hold that a merger benefits the public only if the PUC can demonstrate that the merger savings will lower prices to consumers. For similar reasons, the Commission is also correct in its prevailing interpretation rejecting the contention that "that the City of York test cannot be met without quantifying the specific effects of alleged savings." In re Pennsylvania-American Water Co., 221 P.U.R. 4th 487, 494 (2002) (citation omitted).

We also differ with the OCA's suggestion that the PUC's analysis of the effect of the Verizon/MCI merger on competition is immaterial to its assessment of public benefit. In line with the DOJ and FCC assessments, competitive impact is a substantial component of a rational net public benefits evaluation in the merger context. That the ultimate determination may be that the impact is modest, minimal, or non-existent does not negate the necessity of undertaking the examination in the first instance or remove the factor from the weighing and balancing process. Significantly, in terms of the net public benefits arising out of corporate consolidation, anticompetitive effects may offset or negate advantages and result in a denial of regulatory approval. Indeed, it is for this very reason that large merger transactions are so highly regulated. Thus, in the present case, it is clear that the Commission's satisfaction that competition will not be impaired was a legitimate and significant factor in the overall certification inquiry.

In summary, as indicated in City of York, the appropriate legal framework requires a reviewing court to determine whether substantial evidence supports the Commission's finding that a merger will affirmatively promote the service, accommodation, convenience, or safety of the public in some substantial way. In conducting the underlying inquiry, the Commission is not required to secure legally binding commitments or to quantify benefits where this may be impractical, burdensome, or impossible; rather, the PUC properly applies a preponderance of the evidence standard to make factually-based determinations (including predictive ones informed by expert judgment) concerning certification matters.

The second overarching question presented is whether the Commission's determination concerning public benefit is supported by substantial evidence. In this regard, as well, we differ with the Commonwealth Court's conclusion that there is "no evidence" of benefit inuring to the public as a result of the Verizon/MCI merger. As developed above and in the Commission's opinion, the ALJ's Initial Decision, and Appellants' briefs, the record is replete with evidence of public benefit along very similar lines to that which prevailed in the City of York decision. The Commonwealth Court discounted much of that evidence on the grounds that the joint applicants failed to develop in sufficient detail what particular multimedia services were to be produced by the corporate combination and offered no evidence that any of the asserted benefits would not exist in the absence of the merger. See Popowsky, 917 A.2d at 396. With regard to the former rationale, it is true that Appellants did not name particular services and/or products that have yet to be realized. However, they did describe their underlying objectives in these regards, as well as the means by which they are to be achieved, in sufficient detail to warrant the credence given by the PUC. Indeed, even from a lay perspective, bearing in mind today's technological advances affecting all segments of business and personal life, there is much force to the Commission's conclusion that a combination of Verizon's and MCI's assets and strengths has substantial potential to create an integrated infrastructure supporting delivery of innovative, high-speed data and video services via the fiber-optic network, as well as deployment of mobile devices freeing workers from fixed workstations. See Initial Decision, 2006 WL 995853, at *61, *67. For similar reasons, the Common wealth Court's indication that the Appellants failed to establish that the merger was a necessary prerequisite to the accrual of the relied-upon benefits is facially lacking in merit. Again, the sum and substance of the credited joint applicants' evidence was that the bulk of the benefits would flow from the combination of MCI's Internet network infrastructure with Verizon's facilities and financial resources, an eventuality which simply would not occur absent the corporate transaction.

Certainly, the OCA is correct that previous Commission decisions have required rate concessions complementary to some utility merger transactions. See supra note 16. However, in the present matter, the Commission repeatedly referenced the recent and revolutionary changes affecting the telecommunications industry-including new market structure; rapid technological advances affecting business planning; intense intermodal competition; and altered business incentives, such as the resultant and continuing incentive for vast capital investments in infrastructure, research, and development-in support of its decision not to require price concessions or other special conditions beyond those required at the federal level. On this record, there is ample evidentiary support underlying the PUC's findings and conclusions in these regards. While there is also support for contrary propositions, the Commission was the designated finder of fact, and its factually-based determinations are entitled to respect where, as here, they are supported by substantial evidence. Accord City of York, 449 Pa. at 143, 295 A.2d at 829 ("In light of the Commission's explicit finding that the merger will affirmatively benefit the public, a finding fully supported by substantial evidence, there is no reason to remand this matter to the Commission."). Since the PUC is the agency charged with administration of the scheme of public utility regulation, and in light of its specialized expertise, its judgments concerning weight and balancing of associated policy considerations connected with utility certification is also entitled to the courts' considerable deference. See Popowsky, 550 Pa. at 457, 706 A.2d at 1201 (explaining that a decision based upon the weighing of economic evidence is within the PUC's area of expertise and reviewing courts should not substitute their own judgment on such matters); cf. Constellation Energy, 457 F.3d at 24. See generally supra note 17. It is for this reason that, upon a supported finding of public benefit, merger conditions rest within the sound discretion of the Commission. See supra note 21.

Perhaps in light of the notion that guaranties must be present to support a finding of benefits, a proposition which we have now disapproved, the Commonwealth Court did not mention a number of benefits found by the ALJ and the Commission, including meaningful enhancements to national security, see, In re Verizon, 2006 WL 995853, at *6, *12 (adopting, inter alia, Initial Decision, 2006 WL 995853, at *62), and improvements in service quality, see id. at *12 (adopting, inter alia, Initial Decision, 2006 WL 995853, at *64) 31. Such advantages clearly add support to the PUC's central finding. Moreover, the sum and substance of the Commission decision is that the combined company with its strong resources, enhanced infrastructure, and increased operating efficiencies will benefit the public in the long term in ways that are as meaningful as short-term rate concessions. Indeed, the Commission's opinion makes it clear that its decision to accept a likelihood of longer-term benefits in lieu of more immediate price concessions is grounded in the same philosophy as the General Assembly's decision to move from cost-based to price-cap regulation-both decisions appear to incorporate the underlying understanding that, in a competitive environment, market forces will constrain price and encourage valuable innovation. The assumptions underlying such policy considerations are supported in the record in this case, and the policy is entirely rational.

Again, the Commission's conclusions, grounded on Pennsylvania-specific evidence, are also entirely consistent with those of expert federal agencies, made in the broader, national landscape. Specifically, the FCC found:

[S]ignificant benefits are likely to result from the vertical integration of the largely complementary networks and facilities of Verizon and MCI. . . . We further find that this network integration will permit the merged entity to offer a wider range of services to its broad range of customers. Moreover, customers will benefit not only from the new services, but also from the improvements in performance and reliability resulting from the network integration.

* * *

[B]y broadening its customer base, the merged entity will have an increased incentive to engage in basic research and development. We further find that continued intense competition from other carriers will provide sufficient incentives for the merged company to continue to invest in more applied research and development. As Verizon points out, it will have little choice but to continue investment and innovation. . . .

In re Verizon, 20 F.C.C.R. at 18533-36. Similarly, with the divestitures that DOJ required, it found that the merger would "not harm competition and [would] likely benefit consumers, due to existing competition, emerging technologies, the changing regulatory environment, and exceptionally large merger-specific efficiencies." R.R. at 955a (Department of Justice Press Release dated October 27, 2005). Contrary to suggestions by the Commonwealth Court and the OCA, we do not regard the Commission's references to the results of the federal investigations and accords as an abdication of its responsibility to conduct an independent, state-specific determination of public benefit. Instead, we believe that the federal and state findings are rationally and reasonably complementary. We also disapprove the notion that the Commission should be foreclosed from accepting the noted advantages as benefits pertaining in the Commonwealth on a developed Pennsylvania-specific record merely because they also pertain nationally.

Finally, we recognize the primary benefit of the Verizon/MCI merger, at least in the short term, is to entities in the enterprise market. However, we agree with the Commission and Verizon that requiring that all types of customers receive unique, affirmative, and direct benefits from a transaction, would, in effect, prohibit transactions among companies which target their businesses to particular customer classes, even where other classes suffer no harm. In any event, there was ample evidence of benefit to mass-market customers and the general public, as developed above and as credited by the PUC.

In summary, we agree with Appellants that the PUC considered an extensive evidentiary record and the comprehensive findings of two federal agencies; made numerous, sufficiently detailed, and supported findings of fact concerning the Verizon/MCI merger's likely net affirmative public benefits, which appropriately subsumed an assessment of the merger's probable effect on competition in the Commonwealth; and correctly applied the City of York standard. Thus, we hold that the PUC's conclusion that the Verizon/MCI merger will affirmatively promote the service, accommodation, convenience, or safety of the Pennsylvania public in some substantial way should have been sustained.

The order of the Commonwealth Court is reversed, and the Commission's order is reinstated.

Chief Justice CAPPY, Justices CASTILLE, EAKIN, BAER, BALDWIN and FITZGERALD join the opinion.