I'm surprised by the lack of common sense on this topic. (1) China doesn't just exports goods. It is a leading (if not the leading ) exporter of people http://en.wikipedia.org/wiki/Overseas_Chinese (2) Extrapolating birth ratios stats into "unmarriagable men" doesn't work if you ignore the large difference in marriage rates due culture. Mainland Chinese has a relatively simple old school culture. People marry earlier than in the US and therefore "utilitize" their women at higher rates in the US and have lower divorce rates. I know an surprising number of decent guys in the US in their 40s of all sorts of ethnic backgrounds (white, latino, jewish, asian etc) that never married - sometimes never had a girlfriend. I know an equal number of women in US that have never married into their 40s and dont' look to marry soon. American culture simply does not PUSH as hard as Chinese culture to get married therefore the real gap is not as big as one might assume