THE EFFECT OF SEX RATIOS ON SUICIDE
研究了性别比例如何影响自杀率，利用日本数据发现高性别比例（男性比例高）与男性自杀率上升相关，而对女性自杀率无显著影响，对性别比例失衡国家的公共健康有启示。
Whereas sex ratios are likely to affect the likelihood of marriage, how sex ratios affect health and survival is underexplored. This study uses suicide as a measure of mental health and examines how suicides are affected by sex ratios. As women tend to marry men older than themselves, shrinking populations will lead to higher sex ratios (i.e., higher proportions of men) in the marriage market. Using data from Japan, I find that high sex ratios, both early-life and current, are correlated with higher male suicide rates, whereas female suicide rates are generally not affected. The results of this study have important implications for public health in countries where imbalanced sex ratios are a concern.