The decline in fertility has occurred in almost every country in the world. Furthermore, notes the Nobel-laureate Claudia Goldin, in her 2023 paper “The Downside of Fertility”, every OECD member (bar Israel) has a total fertility rate (average number of children per woman in a lifetime) of less than 2.1 (the replacement rate). Moreover, this is not at all new: “low levels of fertility have existed in many currently developed nations since the mid-1970s.”
世界上几乎所有国家的生育率都在下降。此外，诺贝尔奖得主克劳迪娅•戈尔丁(Claudia Goldin)在其2023年论文《生育的弊端》(The Downside of Fertility)中指出，除以色列外，所有manbetx20客户端下载 合作与发展组织(OECD)成员国的总和生育率（即每名妇女一生平均生育子女数）都低于2.1（即更替水平）。而且，这并非新近现象：“许多如今的发达国家自1970年代中期以来一直处于低生育水平。”
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