Scott analyzes whether whole-body screening MRIs are worth it by doing a detailed cost-benefit calculation, finding they cost about $108,000 per quality-adjusted life-year saved (right around the threshold of cost-effectiveness), and argues that while rich people immune to anxiety might benefit, most people claiming to be rational about medical decisions probably aren't.

Scott analyzes research on whether longer prison sentences reduce crime, examining studies on deterrence, incapacitation, and aftereffects, to conclude that while prison does decrease crime through incapacitation, it's less cost-effective than other methods like policing.

Scott examines data on COVID-19 lockdown effectiveness, finding they likely reduced transmission but at significant costs, with targeted measures being most effective.

The post compares space colonization and terrestrial lifeboats as X-risk mitigation strategies, concluding that space colonies may offer better long-term survival guarantees despite higher costs.

Scott Alexander examines a study showing positive effects of early intervention on at-risk children, but questions its policy implications due to high costs.

Scott Alexander examines evidence on marijuana legalization's effects on usage, health, and drug war costs, finding uncertainties too large for firm conclusions but suggesting traffic accidents may be the key factor.