Just look at the gap between male and female employment rates in America, Japan and western Europe, as Kevin Daly, an economist at Goldman Sachs, does in a recent study (see the left-hand chart).

• 只要看看在美国、日本和西欧国家男性和女性就业率之间的差距，正如高盛集团经济学家凯文.；戴利最近的一项研究（参见左手图）。