というNBER論文が上がっている。原題は「The Ex-Ante Moral Hazard Effects of COVID-19 Vaccines」で、著者はVirat Agrawal(南カリフォルニア大)、Neeraj Sood(同)、Christopher M. Whaley(ランド研究所)。 以下はその要旨。 A long-standing economic question is how protection against harm from insurance or other harm reducing interventions leads to potentially offsetting behavior changes (ex-ante moral hazard). Immunization is a type of insurance, as individual