Evaluating projects on the basis of aggregate (unweighted) costs and benefits is a wide spread practice in cost-benefit analysis. This practice continues despite serious flaws in the "compensation principle", which is the usual welfare theoretic basis to justify the procedure. For this reason we...

When insurance firms can monitor with non-prohibitive costs the consumption of risk-influencing goods by an insured, they have incentives to tax-subsidize the insured's consumption of the goods. If the government cannot monitor at a lower cost than private insurers, intervention is neither...