韓国の大企業と中小企業間の賃金格差について

抄録

　　In this study, we estimated the Mincer earning function and implemented Blinder-Oaxaca decomposition to clarify whether wage disparity of regular workers between large enterprises and SMEs in Korea is actually caused by characteristics such as enterprise size, using micro data from the “Economically Active Population Additional Survey by Employment type”.

　　The results of estimating the Mincer earning function are as follows.　First, the larger the company size, the higher the hourly wage increased even if other characteristics remained the same.　Specifically, hourly wages for enterprises between 5 and 9 employees increased by 16.5% compared to enterprises with less than 5 employees, enterprises between 10 and 29 employees by 24.9%, enterprises between 30 and 99 employees by 30.0%, enterprises between 100 and 299 employees by 34.8%, and enterprises with 300 or more employees by 54.0%.　For women, hourly wages for enterprises between 5 and 9 employees increased by 8.5 compared to enterprises with less than 5 employees, enterprises between 10 and 29 employees by 16.3%, enterprises between 30 and 99 employees by 27.0%, enterprises between 100 and 299 employees by 26.4%, and enterprises with 300 or more employees by 40.7%.　As a result of estimating the Mincer earning function, wage disparities arise depending on the enterprise size, even if workers have the same characteristics as enterprises of other sizes.

　　Next, we attempted to decompose wage disparity between large enterprises and SMEs into disparities based on attributes of enterprise size and other disparities by the Binder-Oaxaca decomposition.　In men, the hourly wage of SMEs was 47.3% lower than for large enterprises.　The results of the Binder-Oaxaca decomposition showed more than half of hourly wage disparities in males, concretely 28.0%, was decomposed into the disparity caused by enterprise size.　In women, the hourly wage of SMEs was 51.8% lower than that of large enterprises with a 42.6% hourly wage disparity.　Concretely 22.1% was decomposed into the disparity caused by enterprise size.　The rest was caused by characteristics of workers other than enterprise size.

　　As a result of the Blinder-Oaxaca decomposition, more than half of the hourly wage disparities for male workers were shown to be caused by enterprise size.

JEL Classifications: J31, J71