Population ethics is widely considered to be exceptionally important and exceptionally difficult. One key source of difficulty is the conflict between certain moral intuitions and analytical results identifying requirements for rational (in the sense of complete and transitive) social choice...

Raiffa (1961) recommends that ambiguity averse participants use objective lotteries to randomly decide on which subjective lottery to bet. Such a preference for randomization is especially important in models based on Anscombe and Aumann's. In three experimental studies, I find little evidence...