SOCIAL CHANGE: THE SEXUAL REVOLUTION*
研究了1900年以来未婚青少年婚前性行为比例从6%升至75%的性革命，用均衡匹配模型解释避孕技术进步降低了婚前性行为成本，并分析个体偏好差异如何影响社会习俗变迁。
In 1900 only 6% of unwed teenage females engaged in premarital sex. Now, three quarters do. The sexual revolution is studied here using an equilibrium matching model, where the costs of premarital sex fall over time due to technological improvement in contraceptives. Individuals differ in their desire for sex. Given this, people tend to circulate in social groups where prospective partners share their views on premarital sex. To the extent that society's customs and mores reflect the aggregation of decentralized decision making by its members, shifts in the economic environment may induce changes in what is perceived as culture.