*91Connecticut resident Heidi Langan sued Johnson & Johnson Consumer Companies, Inc. ("Johnson & Johnson") on behalf of herself and "all others similarly situated" for deceptive labeling. Plaintiff alleged that several of the company's baby products were labeled "natural" when they were not. Langan claimed that this labeling violated the Connecticut Unfair Trade Practices Act (CUTPA), as well as the state consumer protection laws of twenty other states, and sought to certify a plaintiff class. After both parties moved for summary judgment, the district court denied both motions, and certified a class of consumers who purchased two baby bath products in eighteen states.
BACKGROUND
Connecticut resident Heidi Langan purchased several Johnson & Johnson sunscreens and bath products for her baby in 2012. Langan alleges that she purchased those products in part because their labels said they contained "natural" ingredients. In reality, the products were made up of a high percentage of non-natural, non-water ingredients.
In October 2013, Langan sued Johnson & Johnson on behalf of herself and "all others similarly situated" alleging that the company's labeling was deceptive and violated CUTPA as well as the "mini-FTC acts" of twenty other states. Langan sought to certify a plaintiff class and requested compensatory and punitive damages as well as attorney's fees. Both parties moved for summary judgment.
The district court denied both parties' motions for summary judgment and certified a class as to two bath products, but not the sunscreens. The two products, sold under the Aveeno Baby Brand, were the "Calming Comfort Bath" ("bath") and the "Wash and Shampoo" ("wash"). App'x 197. Johnson & Johnson petitioned for permission to appeal pursuant to Federal Rules of Civil Procedure 23(f), and we granted leave. On appeal, Johnson & Johnson principally challenges the district court's conclusions that (1) Langan has Article III standing to bring a class-action claim on behalf of consumers in states other than Connecticut, and (2) the state laws in the other states are sufficiently similar to support certifying the class.
*92DISCUSSION
"We review a district court's decision to certify a class under Rule 23 for abuse of discretion, the legal conclusions that informed its decision de novo , and any findings of fact for clear error." Sykes v. Mel S. Harris & Assocs. LLC ,
I. Article III Standing
Johnson & Johnson argues that Langan lacks constitutional standing to represent putative class members whose claims are governed by the laws of states other than Connecticut. Because a plaintiff's standing to sue implicates our power to hear the case, we must consider the issue even though it was barely raised in and not addressed by the district court. See Keepers, Inc. v. City of Milford,
"Article III, Section 2 of the Constitution limits the jurisdiction of the federal courts to the resolution of 'cases' and 'controversies.' " Mahon v. Ticor Title Ins. Co. ,
Unremarkably, the parties agree that Connecticut's consumer protection statute, CUTPA, does not apply to the purchase of bath and wash products in other states. Likewise, the parties agree that Langan herself has standing to sue Johnson & Johnson under CUTPA because she alleged that she paid a premium in Connecticut for the products, based on Johnson & Johnson's representations that they were natural, and that those injuries can be redressed by an order compelling Johnson & Johnson to pay Langan money damages. See Mahon ,
The only point of contention is whether Langan has standing to bring a class action on behalf of unnamed, yet-to-be-identified class members from other states under those states' consumer protection laws.
*93Because there has been considerable disagreement over this question in the district courts, we write to make explicit what we previously assumed in In re Foodservice Inc. Pricing Litigation ,
"[A]s the Supreme Court has acknowledged, there is some 'tension' in its case law as to whether 'variation' between (1) a named plaintiff's claims and (2) the claims of putative class members 'is a matter of Article III standing ... or whether it goes to the propriety of class certification ....' " NECA-IBEW Health & Welfare Fund v. Goldman Sachs & Co. ,
The doctrine of standing tests whether a prospective litigant may properly invoke the power of the federal courts. See Spokeo, Inc. v. Robins , --- U.S. ----,
Class actions under Rule 23 of the Federal Rules of Civil Procedure are an exception to the general rule that one person cannot litigate injuries on behalf of another. See Wal-Mart Stores, Inc. v. Dukes ,
This requirement is easy enough to satisfy when the would-be class members' cases are substantially identical. For example, a plaintiff who purchased the same product, on the same day, at the same place, from the same defendant, because of the same misleading offer as many other purchasers would plainly have standing to sue on behalf of those similarly situated purchasers.
In reality, it rarely happens that the circumstances surrounding one plaintiff's claim end up being identical to the claims of another putative class member, let alone all of the others. Anticipating this, some of Rule 23 's requirements (e.g. , commonality and typicality under 23(a), and predominance under 23(b) ) exist to prevent courts from certifying classes that do not share sufficiently similar characteristics. See Wal-Mart ,
We have held that the claims of putative class members are too dissimilar to support standing against a particular defendant when that defendant did not actually injure a named plaintiff. In Mahon , we considered a putative consumer class action against title insurance companies that allegedly concealed the availability of reduced rates. See
On the other hand, non-identical injuries of the same general character can support standing. See NECA ,
The question in this case is whether there is a standing problem when a plaintiff attempts to sue on behalf of those who may have claims under different states' laws that generally prohibit the same conduct. Although we have not expressly resolved this question, we have previously assumed that this is an issue best addressed under Rule 23, rather than as a standing issue. See In re Foodservice ,
This approach of considering variations in state laws as questions of predominance under Rule 23(b)(3), rather than standing under Article III, makes sense. For one, it acknowledges the obvious truth that class actions necessarily involve plaintiffs litigating injuries that they themselves would not have standing to litigate. See In re Bayer Corp. ,
This approach also accords with the Supreme Court's preference for dealing with modest variations between class members' claims as substantive questions, not jurisdictional ones. See Gratz ,
Finally, the only other circuit to have addressed this issue has reached the same conclusion. See Morrison ,
We are not convinced by the reasoning of those district courts that have addressed the issue we confront as a standing issue. For example, in Richards v. Direct Energy Servs., LLC , the district court concluded that a Connecticut plaintiff that alleged that the defendant energy company had attracted customers with misleading promises of low rates lacked standing to sue on behalf of Massachusetts consumers who were injured by the same defendant.
Accordingly, we conclude that whether a plaintiff can bring a class action under the state laws of multiple states is a question of predominance under Rule 23(b)(3), not a question of standing under Article III. Since Langan's individual standing to sue is not in doubt, we turn to the question of whether the district court correctly determined that the predominance requirement of Rule 23(b)(3) was satisfied.
II. Predominance
Langan attempted to certify a class under Rule 23(b)(3), the provision that allows for the common "opt-out" class action, a class action designed to bind all class members except those who affirmatively choose to be excluded. See Amchem ,
Variations in state laws do not necessarily prevent a class from satisfying the predominance requirement. See In re U.S. Foodservice ,
The decision to certify a class is a discretionary determination, which we will only overturn if the district court abused its discretion. See In re U.S. Foodservice,
The district court found that Langan had shown predominance since there was no indication that any of the minor differences Johnson & Johnson identified between the various state consumer protection laws "should overwhelm the questions common to the class" given that "[a]ll the states have a private right of action for consumer protection violations, allow class actions, and have various other important similarities." App'x 195-96. On appeal, Johnson & Johnson argues that the district court erred by failing to engage in a rigorous analysis of the similarities and differences in the various state laws at issue. We agree.
Under Rule 23(b)(3), the district court has a "duty," before certifying a class, to "take a close look" at whether the common legal questions predominate over individual ones. Comcast ,
To begin, district courts must do more than take the plaintiff's word that no material differences exist. See Walsh ,
As part of its analysis, a district court that relies on subclasses to cure predominance issues as a prerequisite to certification must identify the required subclasses and explain why they are necessary. See
We are not convinced that the district court here undertook the requisite considered analysis of the variations in state law and the potential need for subclasses that might result from those variations. Although both parties submitted complicated and conflicting summaries of the state consumer protection laws in eighteen states, the district court's analysis consisted of one paragraph. In that paragraph, it is our view that the district court did not sufficiently engage with Johnson & Johnson's arguments about reliance, instead concluding that "it appears" that none of the states' high courts have insisted on reliance. See App'x at 195. The other identified differences-including whether intent to deceive is required, and whether causation can be presumed-were not discussed. As in Sacred Heart , the district court only stated generally that the identified differences were "minor" and "should [not] overwhelm the questions common to the class." App'x at 195. We believe that more precise and greater depth of analysis is required to comport with the "close look" required by the precedent.
Accordingly, we remand the case to the district court to conduct a more thorough analysis. See In re Am. Int'l Grp., Inc. Sec. Litig. ,
CONCLUSION
For these reasons, we VACATE the district court's grant of certification, and REMAND for further proceedings consistent with this opinion.
Although the district court inadvertently omitted Alaska from the list of relevant states on page 26 and in n.3 of its opinion, the district court did include Alaska in the list of states for which it certified a class. Accordingly, we refer to a plaintiff class in eighteen states.
Johnson & Johnson also argues that that the district court erred by not requiring Langan to demonstrate that the proposed class was "administratively feasible." This argument is foreclosed by In re Petrobras Sec. ,
Johnson & Johnson's argument that Mahon , discussed earlier, requires a different result is unpersuasive. First, Mahon 's rejection of "analyz[ing] class certification before Article III standing" only requires that a district court first determine that the party plaintiff was actually injured by each of the named defendants before proceeding to the Rule 23 inquiry. See Mahon,
