What drives China's current account surplus besides trade policy?
Core argument: The authors estimate that competitive saving driven by China's skewed male-female ratio in the youth cohort accounts for more than half of the increase in China's household saving rate between 1990 and 2007.
One motivation for personal or household saving is to raise one’s competitiveness in the dating and marriage market. This component of saving tends to rise with an increase in the imbalance of the male-female ratio in the marriage age cohort (in either direction). In China’s case, a rise in the male-female ratio in the youth cohort since the 1990s has translated into a powerful force to lift the household saving rate. As the marriage market becomes increasingly competitive for young men, parents with a son raise their saving to improve their son’s relative standing in the [marriage] market. A combination of having a son at home and living in a region with a skewed sex ratio greatly pushes up the household saving rate, [while] savings by households with a daughter are not systematically related to the local sex ratio. Across regions, the local sex ratio in the youth cohort strongly predicts the local household saving rate. Their estimates suggest that this mechanism accounts for more than half of the increase in China’s household saving rate between 1990 and 2007. This upward pressure on saving, combined with relatively stable investment demand, generates persistent excess saving and a higher current account surplus.

