Table 5 show that changes caused by R2 between the two layers are separately 0.185,
0.164, 0.182, and these changes’ F test value reach a significant level. After demographic variables are
controlled, the variances of human capital predicting different dimensions of career success are increased
respectively – variance of predicting perceived internal competitiveness is increased by 18.5%, perceived
external competitiveness 16.4% and career satisfaction 18.2%. So, human capital can effectively predict
career success.