And each of their activities not only keeps them fit.

And that is a tragedy.

而這是一個悲劇。

This is the secret economics of thinness.

這就是整個發達國家瘦身的祕密經濟學。越是有錢的人越是瘦。

Across the developed world, the richer people are the thinner they tend to be

This relationship though is driven almost entirely by women.

他們往往是這種關係雖然幾乎完全由女性驅動。

This chart shows the share of men and women in France that are classified as obese and their income levels.

該圖顯示了法國被歸類為肥胖的男性和女性的比例及其收入水平。

Obese women tend to earn far less than their thinner peers.

肥胖婦女的收入往往遠遠低於她們較瘦的同齡人。

But obese men and thin men tend to earn about the same.

但肥胖的男人和瘦弱的男人的收入往往是差不多的。

The same is true in America and in South Korea, obese men tend to earn more than their peers.

在美國也是如此，在韓國，肥胖的男性往往比他們的同齡人收入更高。

But in each of these countries, richer women are much more likely to be thin than poorer ones.

但在這些國家中，較富裕的婦女比較貧窮的婦女更有可能變瘦。

In fact, the correlation is so strong that for an obese woman of average height, losing £65 could have the same impact on her wages as gaining a master's degree.

事實上，這種相關性非常強，對於一個平均身高的肥胖婦女來說，失去65英鎊對她的工資的影響可能與獲得一個碩士學位相同。

Why is this?

這是為什麼呢？

Traditionally, people have believed that poverty which can make it difficult to access healthy foods or find time to exercise can explain why in general, poor people are more likely to be obese.

傳統上，人們認為貧窮會使人難以獲得健康的食物或找到時間鍛鍊，這可以解釋為什麼一般來說窮人更容易肥胖。

But those arguments should apply equally to both men and women and they don't.

但這些論點應該同樣適用於男性和女性，而它們並不適用。

So perhaps the causality runs the other way.

是以，也許因果關係是反過來的，是瘦弱的人在許多方面幫助婦女成為富人。

It is being thin that helps women to become rich.

In many ways, thinness is an economic pursuit.

瘦是一種經濟追求。

Think of the time and money that women invest in trying to eat healthily or attending exercise classes.

想一想婦女在試圖健康飲食或參加鍛鍊課程方面所投入的時間和金錢。

And while social attitudes towards weight may have shifted in recent decades, the economic reality so far has not.

雖然近幾十年來社會對體重的態度可能有所轉變，但到目前為止，經濟現實並沒有改變。