Objectives
To test whether cross-cultural variation in men’s facial hair conforms to patterns predicted by processes of inter-sexual and intra-sexual selection.

Methods
Data were taken from the PEW Research Center’s World’s Muslims’ project that collected information from 14,032 men from 25 countries. An Independent Factor Analysis was used to analyse how suites of demographic factors predict men’s beardedness.

Results
Analyses replicated those from past research using the PEW data, showing that beardedness was more frequent under prevailing conditions of lower health and higher economic disparity.

Conclusions
These findings contribute to evidence that men’s decision to augment their masculinity via full beardedness occurs under conditions characterised by stronger inter-sexual and intra-sexual selection.



中文翻译：

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男性胡须的跨文化变异

目的
测试男性面部毛发的跨文化差异是否符合通过性交和性交选择过程预测的模式。

方法
数据来自PEW研究中心的“世界穆斯林”项目，该项目收集了来自25个国家的14032名男子的信息。独立因素分析用于分析一系列人口因素如何预测男人的胡子。

结果
分析使用PEW数据重复了以往研究的结果，结果表明，在较低的健康状况和较高的经济差异的普遍条件下，胡须更为频繁。

结论
这些发现有助于证明男人决定通过充分的胡须来增加男性气质是在以性交和性交选择更强为特征的条件下发生的。