Waiting for Trivers and Willard: do the rich really favor sons?

Parental investment theory has been put forward as a major evolutionary argument explaining male or female biased birth sex ratio, the Trivers-Willard (T-W) hypothesis, predicting that parents living in good circumstances will bias their investment to sons, whereas parents in poor circumstances will...

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Bibliographic Details
Main Authors: Koziel, S, Ulijaszek, S
Format: Journal article
Language:English
Published: Wiley 2001