IS BERTRAND COMPETITION FOR MEN EVOLUTIONARILY STABLE? That question goes unanswered in Tim Harford's The Logic of Life, reviewed here. Now comes Dr. Helen, the beneficiary of a nepotistic instalanche, proposing a more colorful version of the Bertrand competition. There are dissenting perspectives in the ensuing bull session. There's something missing in a mating model in which the sole criterion for a match is the willingness of the providers in excess supply to put out, to put it bluntly. Shouldn't an excess supply of women at colleges be an incentive for intellectually active women, or women of high integrity, to signal those characteristics as well?

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