Exposición fetal a la testosterona, D2:D4 y altruismo estratégico

A now widely studied putative marker for relative prenatal testosterone is the second-to-fourth digit ratio (2D:4D). This paper tests to what extent 2D:4D, as a proxy for the prenatal ratio of testosterone/estrogens, can predict strategic altruism in experimental games in the lab. Using a sample of 629 students we show that low 2D:4D (higher exposure) subjects are more likely to play strategically, that is passing more money in the Dictator than in the Ultimatum game.