The 2D: 4D digit ratio, the ratio of the length of the second finger to the length of the fourth finger, is often considered a proxy for testosterone exposure in utero. A recent study reported, among other things, an association between the left-hand 2D:4D and self-employment in a sample of 974 adults. In this preregistered study, we replicate the 2D:4D results on a sample of more than 2100 adults from the German Socioeconomic Panel-Innovation Sample (SOEP-IS). We find no statistically significant associations between 2D:4D and self-employment.

中文翻译：

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2D：4D与个体经营：在大量普通人群中进行的预注册复制研究

2D：4D手指比例（第二根手指的长度与第四根手指的长度的比率）通常被认为是子宫内睾丸激素暴露的代表。最近的一项研究报道了974名成年人的样本中，左手2D：4D与自谋职业之间的关联。在这项预先注册的研究中，我们在来自德国社会经济专家小组创新样本（SOEP-IS）的2100多名成年人的样本中复制了2D：4D结果。我们发现2D：4D与个体经营之间没有统计学上的显着关联。