Opinion

ZARELLA, J.

Following our grant of certification, the plaintiff, Geraldine D. Lyon, appealed from the judgment of the Appellate Court affirming the judgment of the trial court, claming that the Appellate Court incorrectly interpreted General Statutes §§ 46a-60 and 46a-70 as barring the plaintiff's employment discrimination action under the doctrine of sovereign immunity. The defendants, the office of the attorney general (attorney general's office) and certain of its employees, Virginia Jones and Edward Reynolds, although agreeing with the plaintiff that the Appellate Court misconstrued § 46a-60, urge this court to affirm that court's interpretation of § 46a-70, and further urge us to affirm the Appellate Court's decision on the alternate ground that the plaintiff's claims are barred by the doctrine of collateral estoppel. We agree with the defendants that the plaintiff's claims are barred by the doctrine of collateral estoppel and agree with the parties that the Appellate Court misconstrued § 46a-60. Accordingly, we affirm in part and reverse in part the judgment of the Appellate Court.

The Appellate Court's opinion recited the following uncontested facts and procedural history. "At the time this case began, the plaintiff was a paralegal specialist 1 at the attorney general's office and had worked in that capacity since 1987. On April 18, 2000, she filed a complaint with the commission on human rights and opportunities (commission) alleging harassment and a hostile work environment, and that she was denied a promotion to paralegal specialist 2 on the discriminatory bases of her age, sex and disability. The commission found that the plaintiff failed to introduce sufficient evidence to show discrimination and [thereafter] issued a release of jurisdiction.

"The plaintiff then filed [an action] in the United States District Court for the District of Connecticut, claiming that the defendants discriminated against her on the bases of age, sex and disability in violation of 42 U.S.C. § 12111 et seq. (Americans with Disabilities Act of 1990), 29 U.S.C. § 621 et seq. (Age Discrimination in Employment Act of 1967), 42 U.S.C. § 2000e-2 (Title VII), and 42 U.S.C. § 1983, as well as General Statutes §§ 46a-58 (a), 46a-60 (a) (1) and 46a-70 (a) of the Connecticut Fair Employment Practices Act [act], General Statutes § 46a-51 et seq. She sought compensatory and punitive damages, attorney's fees and costs, a temporary and permanent injunction and other fair and equitable relief. The District Court dismissed all of her state law based claims and the majority of her federal claims, leaving only her claims under Title VII and 42 U.S.C. § 1983, which alleged a hostile work environment and failure to promote.

"Upon the dismissal by the District Court of her claims based on state law, the plaintiff filed a complaint in the [Superior Court in the] judicial district of Hartford. The plaintiff's amended complaint consisted of four counts alleging age, sex and disability discrimination: one count against the attorney general's office under § 46a-60 (a) (1) and one count against each of the three defendants under § 46a-70 (a).

"While the state claims were pending, the District Court granted the defendants' motion for summary judgment on the remaining federal claims. In its decision, the District Court found that the Title VII failure to promote claim was time barred, that there were no material issues of fact in support of the plaintiff's claim that she was treated differently from other similarly situated individuals, that her treatment was insufficiently severe to create a hostile environment either under Title VII or § 1983, and that there was no discriminatory intent. Lyon v. Jones, 260 F. Sup. 2d 507, 511-14 (D. Conn. 2003), aff'd, 91 Fed. Appx. 196 (2d Cir. 2004). Subsequently, the defendants filed a motion for summary judgment with the trial court, claiming, inter alia, that the doctrines of sovereign immunity and collateral estoppel bar the plaintiff from recovery in state court.

"On February 28, 2006, the court issued a lengthy memorandum of decision dismissing the § 46a-60 (a) (1) claim against the attorney general's office for lack of subject matter jurisdiction because the plaintiff failed to obtain the requisite authorization from the claims commissioner before bringing her § 46a-60 (a) (1) claim against the state. The court also found that although General Statutes § 46a-99 provides plaintiffs with a private right of action for injunctive relief for discrimination by the state in violation of § 46a-70 (a), a claim for compensatory and punitive damages and costs cannot be brought under § 46a-70 (a) without permission to sue from the claims commissioner or the General Assembly." Lyon v. Jones, 104 Conn. App. 547, 549-51, 935 A.2d 201 (2007). The trial court also concluded that the plaintiff's claims for injunctive relief under § 46a-70 were barred by the doctrine of collateral estoppel.

On appeal to the Appellate Court, the plaintiff asserted that the trial court improperly had dismissed her claims under the doctrine of sovereign immunity because the trial court incorrectly had concluded that "General Statutes §§ 4-141 through 4-165 require the plaintiff to obtain authorization from the claims commissioner or the General Assembly prior to bringing a claim against the state under § 46a-60 (a) (1)." Id., 551. The plaintiff also claimed that the trial court improperly had concluded that § 46a-99 does not waive sovereign immunity in an action for damages. Id., 555.

The defendants urged the Appellate Court to affirm the judgment of the trial court with respect to both claims made by the plaintiff. Moreover, the defendants argued that the plaintiff's entire appeal was moot because the trial court's finding of collateral estoppel regarding the claims brought under § 46a-70 provided an independently sufficient, unchallenged alternate ground supporting the trial court's decision. Although the Appellate Court did note that the trial court had found that the plaintiff's § 46a-70 (a) claims were barred by the doctrine of collateral estoppel, and that "[t]he plaintiff failed to challenge the [trial] court's findings of collateral estoppel in her principal brief; id., 548 n. 1; the Appellate Court's decision did not discuss the significance of this fact or address the defendants' mootness argument. The Appellate Court ultimately upheld the decision of the trial court as to both of the plaintiff's claims and affirmed the judgment in favor of the defendants. This certified appeal ensued.

On appeal to this court, the plaintiff challenges the Appellate Court's determination that she was required to obtain authorization from either the claims commissioner or the General Assembly in order to pursue her claims under § 46a-60 (a) (1). The plaintiff also asserts that the Appellate Court improperly concluded that § 46a-99 does not constitute a waiver of the state's sovereign immunity for suits in damages. The defendants now agree with the plaintiff that the Appellate Court improperly interpreted § 46a-60, but they urge this court to affirm the Appellate Court's judgment with respect to § 46a-99. The defendants also offer two alternate grounds for affirmance. First, the defendants argue that the Appellate Court's judgment can be affirmed on the ground that the plaintiff's claims are barred by the doctrine of collateral estoppel. Second, the defendants assert that the Appellate Court's judgment can be affirmed because the plaintiff's discrimination claims are time barred under General Statutes § 46a-82 (e). We agree with the parties' argument concerning § 46a-60 and conclude that the doctrine of sovereign immunity does not bar the plaintiff's claim under that statute. We do not reach the plaintiff's claims under § 46a-70, however, because we conclude that those claims are moot. Furthermore, although we conclude that the plaintiff's claim under § 46a-60 is not barred by the doctrine of sovereign immunity, we agree with the defendants that the claims are precluded by the doctrine of collateral estoppel.

I

As a threshold matter, we note, sua sponte, that the Appellate Court lacked jurisdiction to review the plaintiff's claims under § 46a-70 (a) because those claims are moot. The plaintiff did not challenge the trial court's collateral estoppel finding on appeal to the Appellate Court, a finding that provides an independent basis for upholding the trial court's granting of summary judgment as to the plaintiff's § 46a-70 claims, thus rendering that part of the appeal moot. Our determination that the plaintiff's appeal of her claims brought under § 46a-70 is moot disposes of three of the four counts of her amended complaint dated November 5, 2003.

Mootness raises the issue of a court's subject matter jurisdiction and is therefore appropriately considered even when not raised by one of the parties. "Mootness is a question of justiciability that must be determined as a threshold matter because it implicates [this] court's subject matter jurisdiction. . . ." (Internal quotation marks omitted.) Putman v. Kennedy, 279 Conn. 162, 168, 900 A.2d 1256 (2006); see also State v. McElveen, 261 Conn. 198, 204, 802 A.2d 74 (2002); In re William D., 97 Conn. App. 600, 603, 905 A.2d 696 (2006), aff'd, 284 Conn. 305, 933 A.2d 1147 (2007). "A determination regarding . . . [the Appellate Court's] subject matter jurisdiction is a question of law . . . [and, therefore] our review is plenary." (Internal quotation marks omitted.) Pritchard v. Pritchard, 281 Conn. 262, 270, 914 A.2d 1025 (2007).

The fundamental principles underpinning the mootness doctrine are well settled. "We begin with the four part test for justiciability established in State v. Nardini, 187 Conn. 109, 445 A.2d 304 (1982). . . . Because courts are established to resolve actual controversies, before a claimed controversy is entitled to a resolution on the merits it must be justiciable. Justiciability requires (1) that there be an actual controversy between or among the parties to the dispute . . . (2) that the interests of the parties be adverse . . . (3) that the matter in controversy be capable of being adjudicated by judicial power . . . and (4) that the determination of the controversy will result in practical relief to the complainant. . . . Id., 111-12. . . .

"The mootness doctrine is rooted in the first factor of the Nardini test. State v. McElveen, supra, 261 Conn. 204-205. It is founded on the same policy interests as the doctrine of standing, namely, to assure the vigorous presentation of arguments concerning the matter at issue. . . . This court recently reiterated that the standing doctrine is designed to ensure that courts and parties are not vexed by suits brought to vindicate non-justiciable interests and that judicial decisions which may affect the rights of others are forged in hot controversy, with each view fairly and vigorously represented. . . . Id., 204. Indeed, we note that courts are called upon to determine existing controversies, and thus may not be used as a vehicle to obtain advisory judicial opinions on points of law. Id., 204-205.

"[A]n actual controversy must exist not only at the time the appeal is taken, but also throughout the pendency of the appeal. . . . When, during the pendency of an appeal, events have occurred that preclude an appellate court from granting any practical relief through its disposition of the merits, a case has become moot. . . . Id., 205." (Citation omitted; internal quotation marks omitted.) Wallingford v. Dept. of Public Health, 262 Conn. 758, 766-67, 817 A.2d 644 (2003). "[I]t is not the province of appellate courts to decide moot questions, disconnected from the granting of actual relief or from the determination of which no practical relief can follow." (Emphasis added; internal quotation marks omitted.) Ayala v. Smith, 236 Conn. 89, 93, 671 A.2d 345 (1996). "In determining mootness, the dispositive question is whether a successful appeal would benefit the plaintiff or defendant in any way." Hechtman v. Savitsky, 62 Conn. App. 654, 659, 772 A.2d 673 (2001).

The Appellate Court was faced with an analogous situation in Housing Authority v. Davis, 57 Conn. App. 731, 732, 750 A.2d 1148, cert. denied, 254 Conn. 901, 755 A.2d 218 (2000), in which the plaintiff housing authority brought a three count summary process action alleging, inter alia, serious nuisance and breach of lease, to recover possession of certain premises it had leased to the defendants. The trial court rendered judgment for the plaintiff on both counts. Id. The defendants challenged the finding of serious nuisance on appeal to the Appellate Court but failed to challenge the trial court's breach of lease determination. Id., 732 n. 1. The Appellate Court held that the appeal was moot because, even if that court "were to reverse the trial court's judgment on the third count of the plaintiff's complaint, the judgment for the plaintiff on the first count would remain in effect. No practical relief, therefore, [could] follow from this appeal." Id., 733.

The problem presented by the appeal in the present case with respect to the trial court's collateral estoppel determination, although somewhat unique, is similar in principle to the situation in Housing Authority v. Davis, supra, 57 Conn. App. 731. As the Appellate Court noted in the present case, "[t]he plaintiff failed to challenge the court's findings of collateral estoppel. . . ." Lyon v. Jones, supra, 104 Conn. App. 548 n. 1. Thus, even if we were to agree with the plaintiff on the issue that she does raise with respect to her § 46a-70 (a) claims, we still would not be able to provide her any relief in light of the binding adverse finding with respect to those claims. By the same reasoning applied in Housing Authority v. Davis, supra, 733, the plaintiff's appeal in the present case with respect to her claims brought under § 46a-70 (a) is moot. We conclude, therefore, that the Appellate Court improperly considered the merits of these claims and reverse in part the judgment of that court with respect to the § 46a-70 claims and remand the case to that court with direction to dismiss that portion of the plaintiff's appeal for lack of subject matter jurisdiction.

The trial court dismissed the plaintiff's § 46a-60 claim, on the other hand, solely on the basis that the claim was barred by the doctrine of sovereign immunity. The plaintiff appealed this determination to the Appellate Court; see Lyon v. Jones, supra, 104 Conn. App. 551; and, thereafter, to this court. Thus, the claim brought under § 46a-60 is not moot. The sole remaining issue on appeal, therefore, is whether the Appellate Court properly affirmed the trial court's dismissal of count one of the plaintiff's amended complaint on the basis that it was barred by the doctrine of sovereign immunity.

II

We begin by noting that the remaining issue of whether General Statutes § 46a-100 waives sovereign immunity for actions brought under § 46a-60 concerns a question of statutory construction over which we exercise plenary review. See, e.g., Dept. of Transportation v. White Oak Corp., 287 Conn. 1, 7, 946 A.2d 1219 (2008). "The principles that govern statutory construction are well established. When construing a statute, [o]ur fundamental objective is to ascertain and give effect to the apparent intent of the legislature. . . . In other words, we seek to determine, in a reasoned manner, the meaning of the statutory language as applied to the facts of [the] case, including the question of whether the language actually does apply. . . . In seeking to determine that meaning, General Statutes § 1-2z directs us first to consider the text of the statute itself and its relationship to other statutes. If, after examining such text and considering such relationship, the meaning of such text is plain and unambiguous and does not yield absurd or unworkable results, extratextual evidence of the meaning of the statute shall not be considered. . . . When a statute is not plain and unambiguous, we also look for interpretive guidance to the legislative history and circumstances surrounding its enactment, to the legislative policy it was designed to implement, and to its relationship to existing legislation and common law principles governing the same general subject matter. . . ." (Internal quotation marks omitted.) Friezo v. Friezo, 281 Conn. 166, 181-82, 914 A.2d 533 (2007).

We next proceed to review briefly the doctrine of sovereign immunity and its associated burdens. "It is a well-established rule of the common law that a state cannot be sued without its consent. . . . A sovereign is exempt from suit, not because of any formal conception or obsolete theory, but on the logical and practical ground that there can be no legal right as against the authority that makes the law on which the right depends. . . . The practical and logical basis of the doctrine is today recognized to rest on this principle and on the hazard that the subjection of the state and federal governments to private litigation might constitute a serious interference with the performance of their functions and with their control over their respective instrumentalities, funds, and property." (Citations omitted; internal quotation marks omitted.) Martinez v. Dept. of Public Safety, 263 Conn. 74, 78-79, 818 A.2d 758 (2003).

"We have held that a plaintiff seeking to circumvent the doctrine of sovereign immunity must show that: (1) the legislature, either expressly or by force of a necessary implication, statutorily waived the state's sovereign immunity . . . or (2) in an action for declaratory or injunctive relief, the state officer or officers against whom such relief is sought acted in excess of statutory authority, or pursuant to an unconstitutional statute." (Citation omitted.) Miller v. Egan, 265 Conn. 301, 314, 828 A.2d 549 (2003).

Although the Appellate Court recited this exact standard; Lyon v. Jones, supra, 104 Conn. App. 552; it agreed with the trial court's determination that the plaintiff was required to obtain an authorization from the claims commissioner or the General Assembly in order to pursue her claims under § 46a-60 against the attorney general's office, pursuant to §§ 4-141 through 4-165. Id., 554. We disagree. In our view, § 46a-100 represents an unambiguous waiver of sovereign immunity, authorizing actions against the state for alleged discriminatory employment practices in violation of § 46a-60. This conclusion is bolstered by our review of the operation of the carefully crafted statutory scheme.

Our review of the act reveals that the legislature has devised a comprehensive, ordered scheme through which claims of employment discrimination may be prosecuted. The relevant substantive prohibitions against the discriminatory employment practices alleged by the plaintiff are set forth in § 46a-60 (a), which provides in relevant part: "It shall be a discriminatory practice in violation of this section: (1) For an employer, by the employer or the employer's agent . . . to discriminate against [an] individual in compensation or in terms, conditions or privileges of employment because of the individual's . . . age, sex . . . or physical disability. . . ." The legislature has provided an initial administrative process for individuals "claiming to be aggrieved by an alleged discriminatory practice"; General Statutes § 46a-82 (a); such as the practices proscribed under § 46a-60. Pursuant to § 46a-82 (a), such a person "may, by himself . . . or by [his] attorney, make, sign and file with the commission a complaint in writing under oath, which shall state the name and address of the person alleged to have committed the discriminatory practice, and which shall set forth the particulars thereof and contain such other information as may be required by the commission. . . ."

Upon receiving such a complaint, General Statutes § 46a-83 outlines the procedure that the commission must follow. After serving the complaint on the respondent employer and receiving its response, § 46a-83 (b) provides in relevant part that "the executive director [of the commission] or the executive director's designee shall review the file. . . . If the executive director or the executive director's designee determines that the complaint fails to state a claim for relief or is frivolous on its face, that the respondent is exempt from the provisions of this chapter or that there is no reasonable possibility that investigating the complaint will result in a finding of reasonable cause, the complaint shall be dismissed. . . ." In the event that the commission finds potential merit in the complaint after conducting its initial review, § 46a-83 (c) provides the following instruction: "The commission may conduct mandatory mediation sessions, expedited or extended fact-finding conferences or complete investigations or any combination thereof during the investigatory process for the purpose of finding facts, promoting the voluntary resolution of complaints or determining if there is reasonable cause for believing that a discriminatory practice has been or is being committed as alleged in the complaint."

The act provides several avenues that the complainant may pursue if she is dissatisfied with the foregoing administrative process. First, if the complaint is still pending, General Statutes § 46a-101 (b) provides two methods for obtaining a release of jurisdiction from the commission: "The complainant and the respondent, by themselves or their attorneys, may jointly request that the complainant receive a release from the commission at any time from the date of filing the complaint until the expiration of two hundred ten days from the date of filing of the complaint. The complainant, or his attorney, may request a release from the commission if his complaint with the commission is still pending after the expiration of two hundred ten days from the date of its filing." It appears that, in giving both the parties and the commission the option of shifting the controversy directly to the court, the legislature was seeking a more expeditious method of resolving employment discrimination complaints that may have been delayed at the commission level.

Additionally, General Statutes § 46a-83a (a) provides another option for complainants who want to bring their discrimination claims to a court. Unlike § 46a-101, however, this provision only operates once the commission has dismissed a complaint. "If a complaint is dismissed pursuant to subsection (b) of section 46a-83, or is dismissed for failure to accept full relief pursuant to subsection (c) of said section, and the complainant does not request reconsideration of such dismissal as provided in subsection (e) of said section, the executive director of the commission shall issue a release and the complainant may, within ninety days of receipt of the release from the commission, bring an action in accordance with sections 46a-100 and sections 46a-102 to 46a-104, inclusive." General Statutes § 46a-83a (a).

The statute at issue in the present case, § 46a-100, is the primary vehicle allowing a complainant who has received a release from the commission to further prosecute her claim in court. Section 46a-100 provides: "Any person who has timely filed a complaint with the [commission] in accordance with section 46a-82 and who has obtained a release from the commission in accordance with section 46a-83a or 46a-101, may also bring an action in the superior court for the judicial district in which the discriminatory practice is alleged to have occurred or in which the respondent transacts business, except any action involving a state agency or official may be brought in the superior court for the judicial district of Hartford." (Emphasis added.) We conclude from this language, and from the statute's place in the overarching statutory scheme, that § 46a-100 expressly waives sovereign immunity and creates a cause of action in the Superior Court for claims alleging a violation of § 46a-60 over which the commission has released jurisdiction.

The Appellate Court concluded "that the more reasoned interpretation of this clause [of § 46a-100] regards venue and provides for the Hartford judicial district to be the proper venue for a claim against a state actor." Lyon v. Jones, supra, 104 Conn. App. 554. In order to avoid the obvious logical implication that a venue provision presupposes the right to a substantive cause of action, the Appellate Court injected into the statute a requirement that, after having obtained a release from the commission, state employees must seek authorization from the claims commissioner or General Assembly prior to filing an action. Id., 551. For the reasons that follow, we conclude that this interpretation is untenable.

We begin by addressing the role of the claims commissioner when a party seeks to bring an action against the state. The legislature created the office of the claims commissioner to serve as "the gatekeeper through which [actions] against the state must pass." Id., 553. The Appellate Court correctly noted that "[c]hapter 53 of the General Statutes, §§ 4-141 through 4-165, titled `Claims Against the State,' describes the responsibilities and powers of the claims commissioner." Id. We previously have indicated our understanding of the significance of this statutory scheme: "[Chapter 53] expressly bars [actions] upon claims cognizable by the claims commissioner except as he may authorize, an indication of the legislative determination to preserve sovereign immunity as a defense to monetary claims against the state not sanctioned by the [claims] commissioner or other statutory provisions." (Internal quotation marks omitted.) Krozser v. New Haven, 212 Conn. 415, 421, 562 A.2d 1080 (1989), cert. denied, 493 U.S. 1036, 110 S. Ct. 757, 107 L. Ed. 2d 774 (1990).

General Statutes § 4-142, however, sets forth various exceptions to the claims commissioner's jurisdiction, and provides in relevant part: "There shall be a Claims Commissioner who shall hear and determine all claims against the state except . . . (2) claims upon which suit otherwise is authorized by law including suits to recover similar relief arising from the same set of facts; (3) claims for which an administrative hearing procedure otherwise is established by law. . . ." (Emphasis added.) Before the Appellate Court, the plaintiff argued that, upon receiving a release of jurisdiction from the commission, § 46a-100 waives the state's immunity. With little explanatory analysis, and no mention of the exceptions enumerated in § 4-142, the Appellate Court construed § 46a-100 as merely indicating the appropriate venue for such an action, should it be authorized by the claims commissioner. Specifically, the Appellate Court stated: "In light of the requirement that our state's sovereign immunity not be diminished without clear intent, we find that the more reasoned interpretation of this clause regards venue and provides for the Hartford judicial district to be the proper venue for a claim against a state actor. Thus, we believe that the provisions of § 46a-100 do not constitute a waiver of the state's immunity." Lyon v. Jones, supra, 104 Conn. App. 554.

This interpretation is unsupportable, as it ignores § 4-142 (3), which specifically exempts from the jurisdiction of the claims commissioner "claims for which an administrative hearing procedure otherwise is established by law. . . ." Section 46a-82 (a) provides just such an alternative administrative procedure: "Any person claiming to be aggrieved by an alleged discriminatory practice . . . may, by himself . . . or by [his] attorney, make, sign and file with the commission a complaint in writing under oath. . . ." Thus, it is apparent that claims over which the commission has statutory jurisdiction are, by the express terms of § 4-142 (3), excluded from the purview of the claims commissioner.

Moreover, § 4-142 (2), read together with § 46a-101, also operates to exempt a claim brought under § 46a-60 from the claims commissioner's jurisdiction. Section 46a-101 (a) provides: "No action may be brought in accordance with section 46a-100 unless the complainant has received a release from the commission in accordance with the provisions of this section. " Viewed as a limitation on the availability of a private cause of action, § 46a-101 implies that § 46a-100 creates that cause of action, rather than merely providing rules for determining the proper venue. A complaint brought before the commission alleging a violation of § 46a-60 is simply not "cognizable" by the claims commissioner. Krozser v. New Haven, supra, 212 Conn. 421. Section 46a-100 explicitly authorizes a plaintiff to file a discrimination action, over which the commission has released its jurisdiction, against the state in Superior Court without the approval of the claims commissioner. Indeed, a contrary construction would undermine the provisions of the act, leading to absurd and unworkable results, which the legislature clearly did not intend.

The parties to this appeal, including the attorney general's office as appellee, agree with this conclusion. Indeed, this is the long-standing position of the office of the claims commissioner itself. See Bonner v. State, Office of the Claims Commissioner, Claim No. 12020 (April 23, 1996) ("The claimant has an administrative procedure available to address her claims and can appeal an unfavorable decision from [the commission] to the courts. The claim is therefore excluded under [General Statutes] § 4-142 and [3] and the [c]laims [c]ommissioner lacks subject matter jurisdiction."); DiMaggio v. State, Office of the Claims Commissioner, File No. 16090 (October 25, 1996) ("[The] [c]laimant's allegations here are the same as those for which she seeks relief from [the commission] and are claims for which a civil [action] is authorized by law and an administrative procedure is otherwise established by law. [Section 4-142] [2] and [3]. The [c]ommissioner lacks subject matter jurisdiction and the claim is dismissed."); see also In re Andoh, Office of the Claims Commissioner, Claim No. 20929 (July 3, 2007) (same); Caldwell-Gaines v. State, Office of the Claims Commissioner, File No. 18345 (March 2, 2001) (same). The commission also filed an amicus curiae brief in this case urging the same result.

On the basis of the foregoing, we conclude that claims properly brought before the commission are outside the cognizance of the claims commissioner. Our analysis, however, cannot end here. Although we have concluded that the plaintiff's § 46a-60 claim is not procedurally barred, and was thus improperly resolved on that basis, we still must analyze the plaintiff's substantive claim to determine if, as is suggested by the defendants, that claim is nonetheless precluded under the doctrine of collateral estoppel. We conclude that, because the facts and legal analysis underlying the plaintiff's claims under both §§ 46a-70 and 46a-60 are identical, the doctrine of collateral estoppel also bars relitigation of the § 46a-60 (a) (1) claim.

Both parties agree that the proper legal standard to be applied to the plaintiff's discrimination claims is the same, regardless of the statutory label placed on those claims. Furthermore, the plaintiff does not contest the defendants' assertion that "[t]he trial court's holding that issue preclusion principles barred [the] plaintiff from relitigating her § 46a-70 (a) claim applies equally to [the] plaintiff's § 46a-60 (a) (1) claims." To the contrary, the plaintiff's sole response to the defendants' collateral estoppel argument is her insistence that "new evidence" came to light after the District Court granted summary judgment for the defendants, and that because "prior courts had no opportunity to include the `new' evidence in their decisions," collateral estoppel should not bar her from litigating her discrimination claims in state court. For the reasons set forth in the following discussion, we agree with the defendants.

Before proceeding to discuss the application of the doctrine of collateral estoppel to this case, we briefly set forth the well established fundamental principles underlying the doctrine. "The common-law doctrine of collateral estoppel, or issue preclusion, embodies a judicial policy in favor of judicial economy, the stability of former judgments and finality. . . . Collateral estoppel, or issue preclusion, is that aspect of res judicata which prohibits the relitigation of an issue when that issue was actually litigated and necessarily determined in a prior action between the same parties upon a different claim. . . . For an issue to be subject to collateral estoppel, it must have been fully and fairly litigated in the first action. It also must have been actually decided and the decision must have been necessary to the judgment. . . .

"An issue is actually litigated if it is properly raised in the pleadings or otherwise, submitted for determination, and in fact determined. . . . 1 Restatement (Second), Judgments § 27, comment (d) (1982). An issue is necessarily determined if, in the absence of a determination of the issue, the judgment could not have been validly rendered. F. James G. Hazard, Civil Procedure (3d Ed. 1985) § 11.19. If an issue has been determined, but the judgment is not dependent [on] the determination of the issue, the parties may relitigate the issue in a subsequent action. Findings on nonessential issues usually have the characteristics of dicta. 1 Restatement (Second), [supra, comment (h)]." (Citations omitted; emphasis in original; internal quotation marks omitted.) Lafayette v. General Dynamics Corp., 255 Conn. 762, 772-73, 770 A.2d 1 (2001).

The framework this court employs in assessing disparate treatment discrimination claims under Connecticut law was adapted from the United States Supreme Court's decision in McDonnell Douglas Corp. v. Green, 411 U.S. 792, 802, 93 S. Ct. 1817, 36 L. Ed. 2d 668 (1973), and its progeny. This court had occasion to explain the operation of this framework in Craine v. Trinity College, 259 Conn. 625, 638, 791 A.2d 518 (2002): "[T]here are four elements to a prima facie case where the aggrieved party is alleging illegal denial of tenure: (1) that she belongs to a protected class; (2) that she was qualified for tenure; (3) that, despite her qualifications, she was denied tenure; and (4) that the denial took place under circumstances permitting an inference of discrimination." "Under this analysis, the employee must first make a prima facie case of discrimination. The employer may then rebut the prima facie case by stating a legitimate, nondiscriminatory justification for the employment decision in question. The employee then must demonstrate that the reason proffered by the employer is merely a pretext and that the decision actually was motivated by illegal discriminatory bias." Id., 637. "The most typical method used by plaintiffs to establish the fourth prong of a prima facie case is to introduce evidence that the defendant . . . promoted comparably qualified individuals not in a protected class of individuals." Id., 639. Importantly, it is also well established that "[w]e look to federal law for guidance on interpreting state employment discrimination law, and the analysis is the same under both." Id., 637 n. 6.

In the present case, the District Court granted the defendants' motion for summary judgment on all counts. With respect to the plaintiff's Title VII claim, which was predicated on an allegation that the defendants harassed her and created a hostile work environment in violation of federal law, the District Court specifically determined that "[the plaintiff] has not created a material issue of fact that any of the [enumerated] actions, even if harassing, were motivated by a discriminatory intent. There is no evidence in the record to support [the plaintiff's] claim that she was discriminated against on the basis of sex. [The plaintiff] has not presented any proof demonstrating either that male employees were treated more favorably than she [was] or that [the individual defendants] or any other individual responsible for the harassment expressed or otherwise demonstrated discriminatory animus." Lyon v. Jones, supra, 260 F. Sup. 2d 512-13. The District Court came to a similar conclusion with respect to the plaintiff's claims under 42 U.S.C. § 1983 for the alleged failure to promote: "[The plaintiff] has not created a material issue of fact that she was treated differently than others similarly situated. [She] has not demonstrated that other similarly situated persons received promotions while she did not. Simply listing other individuals, in the absence of any evidence regarding their work performance or duties, who were promoted from [p]aralegal [s]pecialist [1] to [p]aralegal [s]pecialist [2], is insufficient." Id., 513. Thus, the District Court concluded that the plaintiff had failed to present a prima facie case of discrimination or harassment under the test set forth in McDonnell Douglas Corp. Because the issues resolved in the federal claims are the same as those that must be resolved in the state law claims, the plaintiff is collaterally estopped from relitigating those issues.

The only argument the plaintiff proffers in an attempt to avoid preclusion is that she has uncovered new evidence that the District Court did not consider in rendering its decision on the defendants' motion for summary judgment. As the plaintiff admitted at oral argument before this court, however, the District Court did indeed consider this purported new evidence. On May 14, 2003, Judge Hall of the United States District Court for the District of Connecticut issued a ruling on the plaintiff's motion for reconsideration. The plaintiff was seeking reconsideration of the court's ruling granting the defendants' motion for summary judgment on the basis of newly discovered evidence. This evidence included a seniority list indicating that one of the plaintiff's male colleagues was promoted, while she was not. She also submitted "further documentation in support of her hostile work environment claims."

Judge Hall first determined that the new evidence offered by the plaintiff "was available to her prior to the close of discovery" and, therefore, could not be considered new. The court continued, however, noting that, "[e]ven if the court did treat the evidence as `newly discovered' . . . it would not reasonably affect the conclusions reached by the court. . . . [The plaintiff's] evidence does not create a material issue of fact that . . . any . . . male employee . . . was a similarly situated employee who was more favorably treated." (Internal quotation marks omitted.) The court also considered the plaintiff's evidence with respect to the hostile work environment claim and concluded that the evidence was insufficient to create a material issue of fact or to affect the court's judgment in any way. The plaintiff's concession at oral argument before this court, coupled with the District Court's explicit consideration, and rejection, of this new evidence, combine to eliminate the plaintiff's only response to the defendants' collateral estoppel argument.

The plaintiff had a full and fair opportunity to litigate the elements underlying her § 46a-60 claim at the District Court, and she failed to make a prima facie showing of discrimination. Nothing in the record before us, or in the briefs and arguments of counsel, provides any justification for departing from the doctrine of collateral estoppel to allow the plaintiff an opportunity to relitigate this claim in the Superior Court. Thus, for the reasons set forth in this opinion, we conclude that the plaintiff's § 46a-60 claims are barred by the doctrine of collateral estoppel.

The judgment of the Appellate Court is reversed in part and the case is remanded to that court with direction to dismiss that part of the appeal concerning the plaintiff's claims under § 46a-70; the judgment of the Appellate Court is affirmed in all other respects.

In this opinion the other justices concurred.