Do Occupational Regulations Increase Earnings? Evidence from China
研究了中国职业认证和许可对工资的影响，发现许可与平均15%的工资溢价相关，认证与13-14%的溢价相关，但部分效应源于自我选择。
We examine the influence of occupational certification and licensing in China. In the empirical analysis, we find that licensing is associated with an average of 15 percent higher wages and certification with a 13–14 percent higher wage based on ordinary least squares estimates. However, using propensity score and instrumental variable estimates suggests that part of the positive effect of certification on wages is due to self‐selection. In addition, the characteristics of a certificate or license, such as the type and quantity, further influence wage determination in China.