매출액 불안정성과 비정규직 노동에 관한 연구: 우리나라 제조업 패널데이터 분석

In this paper, I analyzed the relationships between industrial product volatility(sales volatility) and temporary worker use and industrial productivity by using the data for 82 Korean manufacturing industries during the 2007-2010. In investigating the relationships between them, I must use the time invariant variable of sales volatility. In estimating the model such a situation, I employ the “fixed effect vector decomposition”(FEVD) estimation which remedy to the inefficiency problem of panel data analysis when time invariant variables are included. Estimating results are summarized as follows. i) in the estimating result of relationship between sales volatility and temporary worker ratio, the higher the sales volatility, the larger the temporary worker ratio, ii) in estimating result of relationship between temporary worker ratio and productivity, I found that the larger the temporary worker ratio, the lower the labor productivity, iii) in addition, even if the industries with higher volatility use more temporary worker, they cannot enjoy the higher productivity, compared to the industries with lower volatility. Under the condition of higher volatility of industrial performance by technology innovation and global demand fluctuation, economic system has to achieve both job security and the labor market flexibility. For these, it is very important that policy-makers alter an undesirable equilibrium of low attended-low contribution, by improving working condition as well as by securing safety net and opportunity of human capital investment.