| Abstract | Personality traits is one of the main roots of entrepreneurship, but the only child’s entrepreneurship is inadequate because of lacking social interaction and resource dilution from siblings which would lead to more risk averse, less competitive and less trusting. Using CHIP data in 2008 and based on the fuzzy regression discontinuity design, this paper finds that only child’s entrepreneurship is significantly lower than not only child, and it also can be proved by the fuzzy regression discontinuity design. On average, only child’s probability of being an entrepreneurship is 5.5 percent lower than not only child, and being a latent entrepreneurship is 2.6 percent lower. Further more, only child performs worse than not only child in some personality traits as estimate, such as more risk averse, less competitive and less trusting, which could increase the probability of being an entrepreneurship and a latent entrepreneurship significantly. It means that one-child policy might be an important cause of entrepreneurship’s decline, and it may have continuous negative impact on economic growth. |