GDP 减少了，因为GDP计算的市场价值，而婚后丈夫和妻子各自为对方做的事都不是市场行为。

同意GDP减少的看法。婚后双方相互的服务不是市场行为，不能计算价值，GDP核算时肯定不能算。这真是个伟大的发现！

谢谢高人

When a woman marries her butler, GDP falls by the amount of the butler’s salary. This
happens because measured total income, and therefore measured GDP, falls by the
amount of the butler’s loss in salary. If GDP truly measured the value of all goods and
services, then the marriage would not affect GDP since the total amount of economic
activity is unchanged. Actual GDP, however, is an imperfect measure of economic activ-
ity because the value of some goods and services is left out. Once the butler’s work
becomes part of his household chores, his services are no longer counted in GDP. As
this example illustrates, GDP does not include the value of any output produced in the
home. Similarly, GDP does not include other goods and services, such as the imputed
rent on durable goods (e.g., cars and refrigerators) and any illegal trade.