Health Human Capital, Height and Wages in China

We estimate the returns to height using data from 12 Chinese cities. We present both ordinary least squares (OLS) and two-stage least squares (TSLS) estimates. In the latter height is instrumented using proxies for health human capital accumulated in childhood and adolescence, which influence adult height. The OLS estimates suggest that an additional centimetre of adult height is associated with wages being 1.1 percent higher for males and 0.9 per cent higher for females. The TSLS estimates suggest each additional centimetre of adult height is associated with wages being 4.8 per cent higher for males and 10.8 per cent for females. The difference reflects the fact that the OLS estimates are predominantly determined by the random genetic factors influencing height, while the TSLS estimates also take into account returns from investment in health human capital during childhood and adolescence. These results imply considerable returns to investment in health human capital.