In most times and places, women on average marry men who are older than themselves. We propose a partial explanation for this difference and for why it is diminishing. In a society where the economic roles of males are more varied and specialized than the roles of females, it may be that the...

We have found several propositions in the economics of information which depend on the log of the cumulative distribution distribution of a random variable being a concave function. In this paper we present several theorems and applications of the property of log-concavity.