We granted certiorari, 464 U. S. 812 (1983), to review a decision of the New York Court of Appeals concerning N. Y. Penal Law §240.35(3) (McKinney 1980), which prohibits loitering “in a public place for the purpose of engaging, or soliciting another person to engage, in deviate sexual intercourse or other sexual behavior of a deviate nature.” Respondents, charged with violating the statute, challenged its constitutionality and the Court of Appeals sustained their claim. 58 N. Y. 2d 936, 447 N. E. 2d 62 (1983). The court concluded that § 240.35(3) is “a companion statute to the consensual sodomy statute . . . which criminalized acts of deviate sexual intercourse between consenting adults” and noted that it had previously held the latter statute unconstitutional in People v. Onofre, 51 N. Y. 2d 476, 415 N. E. 2d 936 (1980), which we declined to review, see 451 U. S. 987 (1981). 58 N. Y. 2d, at 937-938, 447 N. E. 2d, at 62-63. Construing the loitering statute as intended “to punish conduct anticipatory to the act of consensual sodomy,” the Court of Appeals reasoned that “[i]nasmuch as the conduct ultimately contemplated by the loitering statute may not be deemed criminal, we perceive no basis upon which the State may continue to punish loitering for that purpose.” Id., at 938, 447 N. E. 2d, at 63.

Petitioner challenges the decision of the Court of Appeals on the ground that the loitering statute is a valid exercise of the State’s power to control public order.1 Respondents, on *248the other hand, defend the decision by arguing that the statute is unconstitutionally vague and overbroad on its face and that, as applied, it violates their First Amendment, equal protection, and due process rights. We decline to address these arguments, however, because examination of the case, after full briefing and oral argument, has convinced us that the writ of certiorari was improvidently granted. See The Monrosa v. Carbon Black Export, Inc., 359 U. S. 180, 184 (1959).

As the diverse arguments presented in the briefs have demonstrated, the opinion of the Court of Appeals is fairly subject to varying interpretations, leaving us uncertain as to the precise federal constitutional issue the court decided.2 Moreover, whatever the constitutional basis of the Court of *249Appeals’ decision, it was clearly premised on the court’s earlier decision in People v. Onofre, supra, and for that reason a meaningful evaluation of the decision below would entail consideration of the questions decided in that case. Petitioner does not, however, challenge the decision of the New York Court of Appeals in that case. See Brief for Petitioner 2. Cf. Pet. for Cert. 6, n. 1.

Under these circumstances, we are persuaded that this case provides an inappropriate vehicle for resolving the important constitutional issues raised by the parties. We therefore dismiss the writ of certiorari as improvidently granted.

It is so ordered.

concurring.

Although the origins of the Rule of Four are somewhat obscure,1 its administration during the past 60 years has undergone a number of changes.2 Even though our decision today makes no change in the Rule, I regard it as sufficiently significant to warrant these additional comments.

I first note that I agree with the reasons set forth in the per curiam opinion for not deciding this case. I would add (1) that the major reasons were apparent when the certiorari, petition was filed, and (2) that our jurisdiction over this case is problematic at best because the most straightforward interpretation of the New York Court of Appeals’ opinion is that the statutory provision at issue in this case is not sever-able, as a matter of state law, from the provision invalidated in People v. Onofre, 51 N. Y. 2d 476, 415 N. E. 2d 936 (1980), cert. denied, 451 U. S. 987 (1981). The Court, quite correctly in my opinion, therefore declines to address the merits.

Four Members of the Court believe, however, that the merits “should be addressed.” Post, at 252. They do not, *250however, address the merits themselves. Cf. Colorado v. Nunez, 465 U. S. 324 (1984) (concurring opinion). Nor do they attempt to refute the sound reasons offered by the majority for dismissing the writ as improvidently granted. As long as we adhere to the Rule of Four, four Justices have the power to require that a case be briefed, argued, and considered at a postargument conference. Why, then, should they not also have the power to command that its merits be decided by the Court?

The difference in the character of the decision to hear a case and the decision to decide it justifies a difference in the way the decision should be made. As long as we act prudently in selecting cases for review,3 there is relatively little to be lost, and a great deal to be gained, by permitting four Justices who are convinced that a case should be heard to have it placed on the calendar for argument. It might be suggested that the case must be decided unless there has been an intervening development that justifies a dismissal. See generally Rice v. Sioux City Cemetery, 349 U. S. 70 (1955). I am now persuaded, however, that there is always an important intervening development that may be decisive. The Members of the Court have always considered a case more carefully after full briefing and argument on the merits than they could at the time of the certiorari conference, when almost 100 petitions must be considered each week.4 Nevertheless, once a case has been briefed, argued, and studied in chambers, sound principles of judicial economy normally *251outweigh most reasons advanced for dismissing a case. Indeed, in many cases, the majority may remain convinced that the case does not present a question of general significance warranting this Court’s review, but nevertheless proceed to decide the case on the merits because there is no strong countervailing reason to dismiss after the large investment of resources by the parties and the Court.

A decision on the merits does, of course, have serious consequences, particularly when a constitutional issue is raised, and most especially when the constitutional issue presents questions of first impression. The decision to decide a constitutional question may be the most momentous decision that can be made in a case. Fundamental principles of constitutional adjudication counsel against premature consideration of constitutional questions and demand that such questions be presented in a context conducive to the most searching analysis possible. See generally Ashwander v. TV A, 297 U. S. 288, 341 (1936) (Brandéis, J., concurring). The policy of judicial restraint is most salient in this Court, given its role as the ultimate expositor of the meaning of the Constitution, and “perhaps the most effective implement for making the policy effective has been the certiorari jurisdiction conferred upon this Court by Congress.” Rescue Army v. Municipal Court, 331 U. S. 549, 568 (1947). If a majority is convinced after studying the case that its posture, record, or presentation of issues makes it an unwise vehicle for exercising the “gravest and most delicate” function that this Court is called upon to perform, the Rule of Four should not reach so far as to compel the majority to decide the case.

In conclusion, the Rule of Four is a valuable, though not immutable, device for deciding when a case must be argued, but its force is largely spent once the case has been heard. At that point, a more fully informed majority of the Court must decide whether some countervailing principle outweighs the interest in judicial economy in deciding the case.

dissenting.

As I see it, the New York statute was invalidated on federal constitutional grounds, and the merits of that decision are properly before us and should be addressed. Dismissing this case as improvidently granted is not the proper course.