Darwin and the current account?
Sexual competition is a wonderful thing. Just ask any bird of paradise you happen to meet.
Now, in a new NBER working paper (gated version here), Du and Wei argue that it can have aggregate macro consequences as well:
"Large savings and current account surpluses by China and other countries are said to be a contributor to the global current account imbalances and possibly to the recent global financial crisis. This paper proposes a theory of excess savings based on a major, albeit insufficiently recognized by macroeconomists, transformation in many of these societies, namely, a steady increase in the surplus of men relative to women. We construct an OLG model with two sexes and a desire to marry. We show conditions under which an intensified competition in the marriage market can induce men to raise their savings rate, and produce a rise in the aggregate savings and current account surplus. This effect is economically significant if the biological desire to have a partner of the opposite sex is strong. A calibration of the model suggests that this factor could generate economically significant current account responses, or more than 1/2 of the actual current account imbalances observed in the data"
So there you have it people, rampant heterosexuality helped cause the crisis.
This paper certainly has some interesting policy implications, no?