Regulatory Impact on Market Research: Which Framework Wins?

Here's a number that should make you sit up: $258.6 billion. That's what the US digital advertising market hit in 2024, up 14.9% year over year (IAB/PwC Internet Advertising Revenue Report). If you're in market research, you know that's both your client base and your competitor. But here's the twist: that growth isn't just about technology. It's shaped by regulation. And if you're not analyzing regulatory impact properly, you're flying blind.

Why Regulatory Impact Is the Hidden Variable

Let's be blunt: most industry analysis frameworks treat regulation as an afterthought. You run a PESTLE, tick the 'Political' box, and move on. But that's a mistake. Regulation isn't just a constraint; it's a force that reshapes the entire competitive landscape. Consider the European Commission's 2024 update to its market definition notice—the first in over 25 years (European Commission). That single change alters how you define your relevant market, which affects everything from merger reviews to your own strategic planning.

So, which framework should you use to capture regulatory impact? You've got two main contenders: PESTLE for macro-environmental scanning, and Porter's Five Forces for industry-level competitive dynamics. But they answer different questions. PESTLE tells you what's happening in the world; Five Forces tells you how that affects your profits. The CFA Institute recommends using both (CFA Institute). But that's vague. I'm going to give you a specific recommendation based on what you're trying to do.

PESTLE: The Big-Picture Scanner

PESTLE (or PESTEL) is your go-to for identifying external trends that could become threats or opportunities. Political factors include government policies, tax policy, and regulation trends (Washington State University Libraries). Legal factors cover consumer rights, advertising standards, and product labeling (Washington State University Libraries). So, if you're trying to spot upcoming regulatory shifts that could affect your industry, PESTLE is your radar.

But here's the catch: PESTLE is descriptive, not prescriptive. It tells you that a regulation might change, but it doesn't tell you how that will affect the balance of power between you, your suppliers, and your customers. That's where Porter comes in. And it doesn't give you a clear 'so what' for your strategy. It's a list of factors, not a competitive analysis.

Porter's Five Forces: The Muscle for Competitive Impact

Porter's Five Forces is about industry profitability. The stronger the forces, the lower the profit potential (CFA Institute). Regulation can alter each force. For example, restrictive government policy is listed as a barrier to entry in Porter's 2008 article (Harvard Business Review). So, new entrants might be blocked by regulations, which protects incumbents. That's a direct competitive impact.

But Porter's Five Forces has a blind spot: it treats complements as not a sixth force (Harvard Business Review). Brandenburger and Nalebuff argue that complements should be on equal footing with substitutes (Brandenburger & Nalebuff). Why does that matter for regulation? Because regulation often targets complements. Think of data privacy regulations: they don't just affect the data broker; they affect the entire ecosystem of companies that rely on consumer data. If you ignore complements, you miss half the picture.

Head-to-Head: PESTLE vs. Porter's Five Forces for Regulatory Analysis

So, what's the verdict? I'm going to say this: don't choose one. Use PESTLE to identify regulatory changes, then use Porter's Five Forces to analyze how those changes affect your industry's structure. For example, if a new data privacy law (a legal factor) is passed, use PESTLE to identify it. Then, run a Five Forces analysis: Does it raise switching costs for customers? Does it increase barriers to entry? Does it reduce the threat of substitutes? That's the dynamic you need.

Case Study: Applying the Frameworks to the EU Market Definition Update

Let's apply this to a real regulatory event: the European Commission's 2024 revision of its market definition notice (European Commission). That revised notice changed how the relevant product and geographic markets are defined. If you're a market research firm operating in the EU, what does that mean for you?

First, run a PESTLE. The political and legal factors are obvious: a new regulation (the updated notice) is in force. It signals a more modern approach to market definition, likely considering digital markets more carefully. That's an opportunity to advise clients on merger filings.

Second, run Porter's Five Forces. The updated notice could affect buyer power. If your clients are merging, the relevant market definition determines whether the merger is challenged. A broader market definition might weaken buyer power, making it easier for the merger to pass. But a narrower definition could strengthen it. This directly affects your client's profit potential and your own consulting revenue.

Now, consider the HHI thresholds. Under US 2023 Merger Guidelines, a market is highly concentrated if HHI exceeds 1,800, and a merger that increases HHI by more than 100 points is presumed unlawful (US DOJ Antitrust Division). If you're advising a client on a merger, you need to calculate HHI. That's a concrete regulatory impact.

What Should You Do?

Here's my specific recommendation: Make PESTLE your standard starting point for any industry analysis. It's quick, it's broad, and it ensures you don't miss a regulatory shift. But never stop there. Immediately follow up with a Five Forces analysis to understand the competitive implications. And if you're in a sector where complements are important—like tech or data—consider adding that sixth force, as Brandenburger and Nalebuff suggest (Brandenburger & Nalebuff). That will give you the full picture.

Also, don't forget the self-regulation angle. The ICC/ESOMAR Code is the global benchmark for our industry, mandatory for ESOMAR members (ICC/ESOMAR International Code). That's not a government regulation, but it shapes how you do research. Include it in your PESTLE's legal factors? It's not law, but it's a code of conduct. Keep it in mind.

Sources

• European Commission - https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:C_202401645
• IAB/PwC Internet Advertising Revenue Report - https://www.iab.com/research/iab-pwc-internet-advertising-revenue-report-full-year-2024/
• Harvard Business Review (Porter 2008) - https://hbr.org/2008/01/the-five-competitive-forces-that-shape-strategy
• Brandenburger & Nalebuff (Yale SOM paper) - https://som.yale.edu/sites/default/files/2024-12/1-SYMMETRY-AND-THE-SIXTH-FORCE-THE-ESSENTIAL-ROLE-OF-COMPLEMENTS-Adam-Brandenburger-Barry-Nalebuff%202.pdf
• Washington State University Libraries - https://libguides.libraries.wsu.edu/c.php?g=294263&p=4358409
• US DOJ Antitrust Division - https://www.justice.gov/atr/herfindahl-hirschman-index