Advertising and Marketing Law Toolkit: Claims, Endorsements, and Competitor Challenges

By Casey Scott McKay · 2025-04-06

Every advertising dispute is really one of four fights, and knowing which one you are in determines the forum, the evidence, and the price. This toolkit maps the four - the substantiation fight, the falsity fight, the disclosure fight, and the trademark-in-advertising fight - and routes each to the Marksy documents that do the work. It covers what a claim must be able to prove before it runs, when a competitor can sue you under Section 43(a)(1)(B) and when only a regulator can act, why the National Advertising Division resolves more disputes than the federal courts do, and how the endorsement rules reach a brand through the conduct of people it does not employ. It treats comparative advertising honestly, walks the survey problem that decides most implied-falsity cases, and closes with the escalation ladder, the authorities table, and the forms that paper a claim-review program. It is written for the in-house lawyer who has to clear a campaign by Thursday and for the litigator deciding whether to challenge a competitor's ad at all.

IP and Technology > Trademarks | Toolkit | Published 6 April 2025 - Updated 16 March 2026 | Casey Scott McKay - marksy.us

Summary. Every advertising dispute is really one of four fights, and knowing which one you are in determines the forum, the evidence, and the price. This toolkit maps the four — the substantiation fight, the falsity fight, the disclosure fight, and the trademark-in-advertising fight — and routes each to the Marksy documents that do the work. It covers what a claim must be able to prove before it runs, when a competitor can sue you under Section 43(a)(1)(B) and when only a regulator can act, why the National Advertising Division resolves more disputes than the federal courts do, and how the endorsement rules reach a brand through the conduct of people it does not employ. It treats comparative advertising honestly, walks the survey problem that decides most implied-falsity cases, and closes with the escalation ladder, the authorities table, and the forms that paper a claim-review program. It is written for the in-house lawyer who has to clear a campaign by Thursday and for the litigator deciding whether to challenge a competitor's ad at all.

Keywords: false advertising · lanham act section 43(a)(1)(B) · literal falsity · implied deception · substantiation · ftc endorsement guides · influencer disclosure · comparative advertising · puffery · consumer survey · nad challenge · corrective advertising · materiality · lexmark standing · competitor challenge · claim review · green claims · made in usa · testimonial · native advertising

Start Here

On a Tuesday in October, Wrenfield Athletic — a mid-sized maker of running shoes — has five advertising problems on one desk.

Marketing wants to run "40% more energy return than the leading competitor" on a national campaign launching in eleven days. The lab data supports the number against one competitor model tested at one temperature on one surface.

A competitor has just launched an ad claiming its own shoe is "the only shoe clinically proven to reduce injury," which Wrenfield's team believes is false and which is visibly moving share.

Forty-three influencers are posting about Wrenfield's new model under a seeding program run by an agency. Nobody has confirmed whether any of them disclosed the relationship.

The packaging says "Made in USA" on a shoe with a domestically assembled upper and an imported sole unit.

And a regional retailer is running a Wrenfield-branded ad with a discount Wrenfield never authorized, using a competitor's mark in a comparison chart that Wrenfield's counsel has never seen.

Five problems, four different bodies of law, and exactly one thing in common: each turns on what the advertiser can prove, and when it could prove it.

This toolkit is for whoever has to sort that desk. It answers three questions.

Which of the four fights is this? Substantiation, falsity, disclosure, or trademark-in-advertising. They have different elements, different decision-makers, and different remedies, and misclassifying one is how a manageable problem becomes an expensive one.
Who can actually do something about it? A competitor, a regulator, a self-regulatory body, a platform, or a class of consumers — each with different standing, different speed, and different appetite.
What do I build so this stops arriving as an emergency? A claim-review process, a substantiation file, an influencer contract and monitoring program, and a competitor-monitoring docket.

If you read only one thing, read False Advertising Under the Lanham Act. It frames the distinction — literal falsity versus implied deception — that determines whether you need a survey, and the survey is usually the difference between a case worth bringing and one that is not.

The Four Fights

Fight one: substantiation

The question. Did the advertiser possess adequate support for the claim at the time it was made?

Who asks it. Primarily the Federal Trade Commission, under its authority over unfair or deceptive acts or practices at 15 U.S.C. § 45, together with state consumer protection regulators. Competitors cannot bring a freestanding "you had no substantiation" claim in most circuits — they must prove falsity or deception, which is a different and harder thing.

What "adequate" means. It depends on the claim. An establishment claim — one that says or implies a particular level of proof, like "clinically proven" or "tests show" — requires proof at the level claimed. A non-establishment claim requires a reasonable basis, calibrated to the type of claim, the product, the consequences of a false claim, the benefits of a truthful one, and the cost of developing substantiation.

The timing rule that catches everyone. Substantiation must exist before dissemination. Assembling support after a challenge is not substantiation; it is litigation. The entire point of a claim-review process is to make the file exist on the day the ad runs.

Where health, safety, and efficacy claims sit. Higher. Claims about health, safety, or performance affecting either generally require competent and reliable scientific evidence, and for many health claims that means well-controlled human clinical testing.

Fight two: falsity

The question. Is the claim false, or does it deceive a substantial segment of the audience?

Who asks it. Competitors, under 15 U.S.C. § 1125(a)(1)(B) — the false advertising half of Section 43(a). This is the private cause of action, and it is the only one that reliably produces an injunction against a competitor's campaign.

The two paths, and why the distinction governs everything.

Literal falsity. The claim is false on its face, or false by necessary implication. If proven, deception is presumed and no consumer survey is required. This is the cheap path, and it is why litigators fight hard to characterize a claim as literally false.
Implied falsity. The claim is literally true but conveys a false message. Here the plaintiff must prove what consumers actually took away — which means a survey, which means expense, delay, and a battle of experts.

Standing. The zone-of-interests and proximate-cause framework governs who may sue. A plaintiff must allege an injury to a commercial interest in reputation or sales proximately caused by the defendant's misrepresentations. Consumers cannot sue under the Lanham Act; competitors and, in appropriate cases, others in the commercial chain can. See Bringing and Defending a Lanham Act False Advertising Claim.

The elements, in practice. A false or misleading statement of fact in commercial advertising; actual deception or a tendency to deceive a substantial segment; materiality — the deception is likely to influence a purchasing decision; the goods travel in interstate commerce; and injury or likely injury.

Puffery. Vague, subjective, exaggerated boasts that no reasonable consumer would rely on are not actionable. "The world's best coffee" is puffery. "Rated best coffee by a panel of experts" is not, because it is a specific and falsifiable factual claim. The line is measurability.

Fight three: disclosure

The question. Was a material connection, a limitation, or a condition disclosed clearly and conspicuously?

Who asks it. The FTC principally, plus state attorneys general, plus platforms enforcing their own rules, plus — increasingly — plaintiffs' firms in consumer class actions.

Endorsements and testimonials. The endorsement rules at 16 C.F.R. Part 255 require disclosure of material connections between an endorser and an advertiser. The obligation reaches the advertiser, not just the endorser, and the advertiser cannot escape it by hiring an agency that hires a network that hires the creator. See Endorsements, Influencers, and the Law of Paid Praise; Building an Influencer and Endorsement Compliance Program.

What "clear and conspicuous" means. Unavoidable. In the same medium as the claim. In plain language. Not buried in a hashtag block, not behind a "more" link, not in a caption when the endorsement is in a video.

The other disclosures. Negative option and automatic renewal terms; "free" offers with conditions; savings claims that need a bona fide reference price; environmental benefit claims that need qualification; and origin claims like "Made in USA," which requires that all or virtually all of the product be made domestically.

Fight four: trademark in advertising

The question. Does the use of somebody else's mark in an ad create confusion, or is it lawful comparative or nominative use?

Who asks it. The mark owner, under 15 U.S.C. § 1114 for registered marks or 15 U.S.C. § 1125(a)(1)(A) for unregistered ones.

The short answer. Truthful comparative advertising using a competitor's mark to identify the competitor is lawful. The claim usually fails on confusion and succeeds, if at all, on falsity — which routes it back to Fight two.

Nominative fair use. Where the defendant uses the mark to refer to the plaintiff's product, courts apply a framework asking whether the product is readily identifiable without the mark, whether only so much of the mark was used as reasonably necessary, and whether the user did anything to suggest sponsorship or endorsement. See Descriptive and Nominative Fair Use; Raising a Trademark Fair Use Defense.

Keyword advertising sits here too, and mostly resolves in the advertiser's favor. The fight has moved from the keyword purchase to the ad copy and landing page. See Buying a Competitor's Name; Keyword Advertising Compliance and Enforcement Checklist.

Choosing a Forum: Four Doors, Four Prices

| Forum | Who can use it | Remedy | Speed | Realistic cost | |---|---|---|---|---| | Platform complaint | Anyone with a policy basis | Ad removal or account action | Days | Nominal | | Self-regulatory challenge | Competitors | Recommendation to modify or discontinue; referral to the FTC on non-compliance | 2–4 months | Low five figures | | Federal court, § 43(a)(1)(B) | Competitors with standing | Injunction, profits, damages, corrective advertising, fees in exceptional cases | 12–30 months | Six figures and up | | Regulator | You can only complain, not control | Consent orders, civil penalties, redress | Months to years | Your time |

The self-regulatory door deserves more attention than it gets. Advertising self-regulation resolves competitor disputes faster and far more cheaply than litigation, the decisions are published, compliance rates are high, and non-compliance is referred to the FTC — which is itself a meaningful sanction. For a claim that is clearly unsupported and clearly harmful, this is usually the right first move, not the last resort.

When to go straight to federal court. When you need a preliminary injunction on a fast-moving campaign, when the falsity is literal and provable without a survey, when money matters, or when the adversary has ignored a self-regulatory recommendation.

The Substantiation File: What It Contains

The single highest-value artifact in this practice is a claim-by-claim substantiation index, assembled before dissemination.

For each claim, record: the exact claim language as it will appear; the medium; the date of first dissemination; the type of claim (establishment or not); the supporting evidence with a document reference; who reviewed it; and the date of review.

Types of support, roughly in descending order of strength. Well-controlled human clinical trials for health and efficacy claims. Independent third-party testing to a recognized standard. Internal testing under a documented protocol. Consumer perception research for taste and preference claims. Competent expert opinion. Published literature, where genuinely applicable to the product as sold.

Common failures. Testing one competitor and claiming superiority over "leading competitors." Testing under conditions that flatter the product without disclosing them. Relying on an ingredient study to support a finished-product claim. Support that predates a reformulation. And the perennial one: support that exists in an engineer's email and nowhere findable.

The retention rule. Keep it for as long as the claim runs plus the longest applicable limitations period. A claim challenged four years after it ran is defended with the file, not with recollection.

Comparative Advertising Without Getting Sued

Comparative advertising is lawful, effective, and the single most common source of competitor litigation. Six rules make it survivable.

One: compare like to like. Same category, same use conditions, current formulations, and a competitor product a consumer could actually buy today.

Two: disclose the basis. "Based on independent testing of X versus Y under Z conditions" converts a bare superiority claim into a supported one and dramatically narrows what a challenger can attack.

Three: do not overstate the scope. Testing against one product supports a claim about that product. It does not support "outperforms all leading brands."

Four: use the competitor's mark accurately. Correct spelling, correct styling, no alteration, no visual mockery that shifts the message from comparison to disparagement.

Five: watch the implied message, not just the words. Ads communicate through images, juxtaposition, and sequence. A literally accurate voiceover over a misleading visual is an implied falsity case waiting to be filed.

Six: get the substantiation before the media buy. The most expensive advertising mistake is a campaign pulled in week two of a national flight.

Endorsements, Influencers, and Creators

The disclosure fight has become the most common enforcement surface in advertising, because it is the easiest to detect and the hardest to control.

The reach of the obligation. 16 C.F.R. Part 255 applies to any material connection between endorser and advertiser that would not be reasonably expected by the audience — payment, free product, a discount, an affiliate commission, a contest entry, or an employment relationship.

The advertiser's exposure. An advertiser that provides the incentive is responsible for the disclosure, whether or not it wrote the post. Agencies and networks in between do not break the chain.

Employee posts count. An employee posting enthusiastically about the employer's product has a material connection that a reader would not expect. Social media policies should say so.

Endorsements must reflect honest opinions and actual experience, and the advertiser cannot use an endorsement to make a claim it could not make directly. A creator saying "this cured my migraines" is a health claim the brand must be able to substantiate.

What a compliant program looks like. A written contract requiring disclosure in specified form; approved claim language and a prohibited-claims list; a monitoring process that samples posts; a documented remediation path; and termination rights for repeat failures. See Building an Influencer and Endorsement Compliance Program.

And the personality-rights layer. Using a person's name, image, likeness, or voice in advertising implicates the right of publicity independent of any endorsement rule, and the analysis differs by state. See Your Face Is Not Public Domain; Right of Publicity and Personal Brand Toolkit.

The Survey Problem

Implied-falsity cases are decided by consumer surveys, and most surveys are attacked successfully.

What a court looks for. A properly defined universe of relevant consumers; a representative sample; a stimulus that replicates the ad in context; questions that do not lead; a control that isolates the challenged message; double-blind administration; and an expert who can defend every design choice.

The universe error is the most common fatal flaw: surveying general consumers when the purchasers are specialists, or surveying purchasers of the plaintiff's product rather than the market.

The control error is the most consequential: without a control cell, the survey cannot separate the message the ad conveyed from noise and preexisting belief.

The practical consequence for a plaintiff. If your case requires a survey, budget for it at the outset and commission it early — a survey designed after the preliminary injunction motion is briefed is a survey that arrives too late to matter. See Trademark Survey Design and Challenge Checklist.

The First Seventy-Two Hours of a Competitor Challenge

Advertising campaigns are short. A dispute that takes six months to frame has already lost most of its value, so the early work matters disproportionately.

Hour one: capture the ad. Every version, every medium, every market. Video files, not descriptions. Screenshots with URLs and timestamps. Print scans with publication and date. Broadcast captures with the network and airtime. Ads change and disappear, and a claim you cannot produce is a claim you cannot challenge.

Hour two: identify the exact claim. Write down the specific words and images you say are false. "Their whole campaign is misleading" is not a claim; "the phrase 'clinically proven to reduce injury,' spoken at 0:14 over footage of a runner, conveys that a controlled clinical trial established injury reduction" is. Everything downstream — the falsity theory, the survey, the demand letter — is built on that sentence.

Day one: classify it as literal or implied. This single decision drives cost by an order of magnitude. Literal falsity means you may not need a survey and can move quickly for preliminary relief. Implied falsity means a survey, an expert, and a timeline measured in months. Be honest in this assessment; a plaintiff who characterizes an implied claim as literal and loses that argument at the hearing has usually lost the motion.

Day one: assess materiality. Would the claim influence a purchasing decision? For a claim that goes to the product's central benefit, materiality is often presumed or easily shown. For a peripheral claim, it may be the weakest element in the case, and it is worth knowing that before the budget is committed.

Day two: check your own house. The most common outcome of a competitor challenge is a counterclaim. Pull your own comparable claims, confirm each has a current substantiation file, and identify anything that would be embarrassing in discovery. A challenge brought by an advertiser with unsupported claims of its own is a challenge that ends in a mutual standstill at best.

Day two: pick the door. Platform complaint for an ad that violates a published policy — fastest and cheapest. Self-regulatory challenge for a clearly unsupported claim where a published recommendation and the referral threat will do the work. Federal court where you need speed, an injunction, and the deterrent value of an order. Regulator referral where the conduct is broad, consumer-facing, and beyond your commercial interest.

Day three: send the letter, or do not. A demand letter to a competitor is a strategic choice, not a formality. It can produce a fast fix; it can also produce a declaratory judgment action in a forum you did not choose, and it starts the clock on the other side's preparation. Where preliminary relief is the goal and the falsity is clear, some plaintiffs file first and negotiate after. Where the relationship matters or the claim is close, the letter is the better opening. See Trademark Dispute Resolution Toolkit.

Throughout: preserve. Litigation holds on both sides of the aisle, including the marketing team's messages, the agency's files, and the testing data. The substantiation file is the case, and its integrity is the first thing an opponent will attack.

And the discipline that separates good programs from reactive ones: most challengeable claims are never challenged, because nobody was watching. A monitoring docket that samples competitor advertising monthly and flags falsifiable claims costs very little and converts this entire chapter from an emergency response into a scheduled decision.

Remedies and What They Are Worth

Injunctive relief is the main event. Most false advertising plaintiffs want the ad off the air, and a preliminary injunction that achieves that in eight weeks is worth more than a damages award three years later.

Monetary relief under 15 U.S.C. § 1117 includes the defendant's profits, the plaintiff's damages, and costs, subject to principles of equity, with discretionary enhancement up to three times actual damages as compensation, not as a penalty.

Corrective advertising is available where the false claims caused lasting consumer misimpression, measured either by the cost of the offending campaign or by what it would cost to repair the harm. It is hard to win and worth pleading. See Trademark Monetary Recovery Checklist.

Fees are available in exceptional cases under 15 U.S.C. § 1117(a), assessed on the totality of the circumstances.

And insurance. Advertising injury coverage under a commercial general liability policy frequently reaches these claims, and the duty to defend is broader than the duty to indemnify. Tender early. See Who Pays for the IP Lawsuit?; Tendering and Winning an IP Coverage Claim.

Regulated Categories: Where the Rules Are Different

Financial services. Advertising review, approval, filing, and recordkeeping obligations attach to regulated entities, and the rules govern how performance is presented, what testimonials are permitted, and what disclosures accompany what claims. See Branding Money; Financial Services Branding Checklist.

Health, drugs, devices, and supplements. Claims are constrained by what the product is approved or permitted to claim, and the line between a structure-function claim and a disease claim is where enforcement concentrates.

Food and beverage. Nutrient content claims, health claims, and labeling requirements operate alongside the general deception rules, and "natural," "healthy," and origin claims are recurring flashpoints.

Environmental claims. General benefit claims are difficult to substantiate and should be qualified specifically. Carbon, recyclability, and compostability claims each carry their own proof problems.

Alcohol, cannabis, firearms, and supplements carry category-specific advertising restrictions and, in some channels, pre-approval. See Regulated Industry Branding Toolkit.

Building the Program

A claim-review gate. No claim runs without a documented review. The gate should be light for repeat claims drawn from an approved library and heavy for new establishment claims.

An approved-claims library. The single best efficiency measure in this practice. Claims that have been reviewed and substantiated, with their conditions and required disclosures attached, reusable without re-review.

A prohibited-claims list. Equally valuable and rarely maintained: the claims legal has rejected, with the reason, so marketing stops proposing them.

A substantiation index keyed to the library, with document references and review dates.

An influencer contract and monitoring cycle.

A competitor-monitoring docket. Someone should be watching competitor claims the way someone watches competitor trademark filings. Most challengeable claims are never challenged because nobody was assigned to look.

An incident procedure. What happens when a claim turns out to be unsupported: who decides to pull the campaign, who notifies the channel partners, and how the correction is documented.

What happened to Wrenfield. The energy-return claim ran, narrowed to name the specific competitor model and the test conditions, with the protocol referenced in a footnote — a change that cost nothing and removed the strongest line of attack. The competitor's "only shoe clinically proven" claim went to a self-regulatory challenge rather than to court, because the phrase "clinically proven" is an establishment claim and the competitor's support was a single uncontrolled study; the claim was discontinued in about three months for a fraction of what a preliminary injunction motion would have cost. The influencer program was paused for six days while the agency confirmed disclosures; nine of the forty-three posts were non-compliant and were corrected. The "Made in USA" claim came off the packaging at the next print run and was replaced with a specific and accurate statement about domestic assembly. And the retailer's unauthorized ad turned out to be a contract problem, resolved with a two-page authorization containing an approved-claims schedule — which is where it should have been addressed a year earlier.

A Suggested Reading Path

If you have a specific problem right now, branch:

A competitor's ad is hurting you. False Advertising Under the Lanham Act → Bringing and Defending a Lanham Act False Advertising Claim → Trademark Survey Design and Challenge Checklist.
Your influencer program is unreviewed. Endorsements, Influencers, and the Law of Paid Praise → Building an Influencer and Endorsement Compliance Program.
You want to use a competitor's mark in an ad. Descriptive and Nominative Fair Use → Raising a Trademark Fair Use Defense → Trademark Fair Use Audit Checklist.
A competitor is bidding on your brand name. Buying a Competitor's Name → Keyword Advertising Compliance and Enforcement Checklist → Keyword Advertising, SEO, and Search Marketing Toolkit.
You have been sued and want coverage. Who Pays for the IP Lawsuit? → Tendering and Winning an IP Coverage Claim.

If you are building the program from nothing, read in this order:

False Advertising Under the Lanham Act — the framework everything else sits inside.
Endorsements, Influencers, and the Law of Paid Praise — the highest-volume compliance surface.
Building an Influencer and Endorsement Compliance Program — the contract and the monitoring cycle.
Trademark Fair Use Audit Checklist — clearing third-party marks in your own content.
Keyword Advertising Compliance and Enforcement Checklist — audit your own account before you complain about anyone else's.
Bringing and Defending a Lanham Act False Advertising Claim — the escalation runbook.
Trademark Monetary Recovery Checklist — what a win is worth, so the budget decision is informed.

Primary Authorities

| Authority | Rule, in one line | |---|---| | 15 U.S.C. § 1125(a)(1)(B) | Civil liability for false or misleading descriptions of fact in commercial advertising that misrepresent the nature, characteristics, qualities, or geographic origin of goods, services, or commercial activities. | | 15 U.S.C. § 1125(a)(1)(A) | False designation of origin and false suggestion of affiliation, sponsorship, or approval. | | 15 U.S.C. § 1114 | Infringement of a registered mark; limited remedies against innocent publishers of paid advertising. | | 15 U.S.C. § 1116 | Injunctive power of the courts; the primary remedy in advertising disputes. | | 15 U.S.C. § 1117(a) | Profits, damages, costs; enhancement as compensation not penalty; fees in exceptional cases. | | 15 U.S.C. § 1115(b)(4) | Descriptive fair use as a defense to use of a term otherwise than as a mark. | | 15 U.S.C. § 45 | FTC authority over unfair or deceptive acts or practices; the substantiation doctrine's statutory home. | | 15 U.S.C. § 52 | False advertisements for food, drugs, devices, services, and cosmetics. | | 15 U.S.C. § 53(b) | FTC authority to seek injunctive relief in district court. | | 15 U.S.C. § 57b | Consumer redress for rule violations and certain unfair or deceptive practices. | | 16 C.F.R. Part 255 | Endorsements and testimonials; material connection disclosure; the advertiser's responsibility for endorser claims. | | 16 C.F.R. Part 260 | Environmental marketing claims; general benefit claims and qualification requirements. | | 16 C.F.R. Part 233 | Deceptive pricing; bona fide reference prices for savings claims. | | 16 C.F.R. Part 251 | "Free" and similar offers; disclosure of conditions. | | 16 C.F.R. Part 436 | Franchise Rule; disclosure obligations triggered by trademark licensing with control and payment. | | 15 U.S.C. § 1051 | Registration as the foundation for the trademark-in-advertising claim. | | 15 U.S.C. § 1127 | Definitions; use in commerce; the abandonment provisions that reach uncontrolled advertising by licensees. |

Forms and Templates

License Agreement Template is the instrument for authorizing retailers, distributors, and affiliates to use your marks in their own advertising — the unauthorized-retailer-ad problem in the opening scenario is a contract problem before it is an enforcement problem, and a short authorization with approved-claim and channel terms prevents more disputes than any demand letter. Pair it with Draft License Agreement for the drafting sequence.

For the influencer and creator layer, adapt the same license structure into a short-form engagement: the grant, the approved claims schedule, the required disclosure form, the prohibited claims list, the monitoring consent, and the termination right. Attach the approved-claims library as an exhibit rather than restating it, so the library remains the single source of truth.

For competitor disputes that resolve by agreement — and most do — the coexistence structure discussed in Concurrent Use and Consent Agreement Checklist carries the negative-keyword covenants, comparative-claim restrictions, and notice provisions that settle search and comparison fights without litigation.

Related Toolkits and Checklists

Keyword Advertising, SEO, and Search Marketing Toolkit is the deep treatment of paid and organic search, and it takes over where the trademark-in-advertising section here stops. Online Brand Protection Toolkit covers the six online surfaces on which an advertising problem usually first appears. Right of Publicity and Personal Brand Toolkit is the companion for any campaign using a real person.

IP Insurance and Risk Transfer Toolkit is where the defense cost of an advertising claim gets shifted, and it should be read before the first tender rather than after. Regulated Industry Branding Toolkit and Brand Name Approval Toolkit cover the categories where advertising review is a licensing condition rather than a best practice.

Marketplace and Platform Liability Toolkit matters because platform policy enforcement is faster than any legal remedy and is frequently the actual resolution. Trademark Defenses Toolkit is the mirror image of a challenge you are contemplating, and reading it first is the cheapest way to test a theory. The Brand Owner's Master Toolkit indexes the whole shelf.