2.1 Data selection
In view of the above problems，a single panel data analysis method is difficult to distinguish human capital heterogeneity features of time series.And regression processing for the data of time series can get a good degree of separation.
The high quality human capital with the higher marginal revenue should show high efficiency.
This study uses the level of education to explain the heterogeneity of human capital investment in different regions and measures the regional fixed asset stock as material input，uses GDP as the output indicator.This study uses the CPI index for the past years to get the price adjustment GDP data.
Calculate the stock of fixed assets using the perpetual inventory method.A capital stock equal to last year stock minus depreciation，and add the new increase in the capital.
Reference Jing Xueqing（2013），is estimated using the perpetual inventory method that province fixed assets stock estimates in 2013.The depreciation rate is 10%.
Table 1 2013 regional human capital and GDP output in the provincial area
Continued Table 1
Data source：according to China Statistical Yearbook 2014 calculation.