Research starting points
This is an open stub. Bureaucracy - What Government Agencies Do And Why They Do It addresses how agencies operate; Analyzing Political Positions (MOC) holds particular policy proposals; 60.3.7 Economics covers the economic trade-offs. A future claim here should specify the regulation, authority, affected population, and measured outcome.
Haidt, Chapter 12 — leaded gasoline as a regulation case with two evidence levels
Haidt reports that U.S. vehicles emitted about 200,000 tons of lead per year by 1973, that industry had resisted a ban, and that a phaseout begun under Carter survived Reagan-era resistance through bipartisan support. As lead disappeared from gasoline, childhood blood-lead levels fell. That makes the case a strong example of regulation addressing an externality: buyers and refiners received the product’s benefit while children and the public bore neurological and environmental costs not represented in the sale.
Keep the exposure result separate from Haidt’s more ambitious causal claims. He cites source-era studies suggesting the phaseout may explain up to half of the 1990s crime decline and an endnote estimate that crime-reduction benefits were about twenty times regulatory costs. Those estimates exploit differences in state timing and are important hypotheses, not settled shares; later evidence, alternative crime explanations, measurement choices, lag assumptions, and current reviews must be checked before quantitative reuse. The defensible lesson is neither “regulation always works” nor “markets always self-correct.” Specify the harm, causal mechanism, authority, compliance rule, alternatives, feedback, unintended effects, distribution, and counterfactual. Lead phaseout and crime hypothesis, PDF pp. 336–337 (file not included in this release) · Lead sources and cost-benefit claim, Chapter 12 endnotes 54–59, PDF p. 430 (file not included in this release) · Chapter 12 source audit