La critique d'ad hocite est courante en economie, mais elle reste confuse, reposant aussi bien sur des arguments d'ordre heuristique (fondements microéconomiques), que sur des arguments d'ordre empirique (ajustement d'une theorie aux faits). Si l'epistemologie d'inspiration popperienne fournit...

I study the use of risk adjusters as a regulatory instrument for combatting cream-skimming incentives in a private health insurance market. It is assumed that insurance coverage is mandatory for all individuals, and that insurers must charge community-rated premiums - i.e., premiums independent...

This paper shows that moving from market segmentation to market integration (i.e. firms can no longer discriminate among markets) has anti-competitive effects in a repeated game setting in which a simple trigger strategy is the enforcement strategy. In particular, we show that two countries can...