Testing the Opportunity Hypothesis

The subject now is the evidence behind a disclosure-created entry opportunity. The question is not merely whether business births rise after an IPO or an environmental rule, but whether the location, timing, and type of response fit the information and incumbent-adjustment mechanisms. A reader can make a better judgment by treating heterogeneity and falsification tests as clues with different strengths, then keeping the unknowns about entrants and social outcomes in view.

A headline average can hide the difference between a relevant signal and a coincident boom. If disclosure matters because it informs prospective entrants, the response should be stronger where the information is tied to their industry, available in their geography, or valuable under uncertainty. If disclosure matters because it pressures incumbents, entry should be greater where affected firms reduce activity or face more scrutiny. If neither pattern appears, the disclosure explanation becomes less persuasive. The two studies do not offer a single definitive test, but their cross-sectional patterns can be read against these predictions.

Patterns that discriminate mechanisms

The BFI evidence supplies the clearest relevance test. Public-firm presence is associated with more establishment births across county–industry–year observations, but that measure is broad. It may capture public information, or it may capture the skilled workforce, infrastructure, customers, capital, and suppliers that tend to surround public companies. The IPO analysis is more revealing because it marks a change in the information environment. Establishment births rise after an IPO in the local county, and the increase is much larger when the establishment and the IPO firm share an industry—about 30% in the reported same-industry comparison versus roughly 2% and statistically insignificant for different industries.

That contrast is not a decorative detail. A general local boom should have reasons to affect restaurants, manufacturers, professional services, and unrelated businesses together. An industry-specific response is more consistent with entrepreneurs using information about the market they are considering. It could still reflect an industry shock that coincides with the IPO, so the pattern is not proof. But it is more diagnostic than a positive average across all industries because it matches the predicted relevance of the disclosure.

Geography supplies a second test. The BFI study expects soft information—local relationships, business knowledge, and interpretation by intermediaries—to reinforce the hard information in public filings. A person near the public firm may know which suppliers are constrained, which customers are underserved, or which workers can move into a new business. The response's local concentration is therefore consistent with a transmission mechanism in which formal disclosure becomes more usable through proximity. Distance does not make public information inaccessible in a legal sense; it can make the information harder to interpret or act on.

The size pattern points to a related margin. The BFI study reports a larger relationship between public-firm presence and small establishments than between public-firm presence and larger establishments. Small ventures may lack the research staff, accumulated contacts, and capital that let an established company acquire information privately. A public signal can therefore matter more to a marginal small entrant. But the result still measures establishments, not necessarily newly founded independent firms, and it does not show that a small owner read the disclosure. It identifies where the aggregate response is concentrated, not the identity or success of the responding business.

The BFI mechanism tests add variation in the expected value of new information. The registration response is larger after private-to-public IPOs than after spinoffs of subsidiaries of already-public firms. A private company going public is expected to reveal more that outsiders could not previously obtain, whereas a parent may already have disclosed information about a subsidiary.