A New Approach to Measuring the Gap between Marginal Productivity and Wages of Workers
The idea that the productivity and wages of workers are not necessarily equal has long attracted the attention of many economists. Indeed, the lack of a method to measure the productivity-wage gap has hindered the development of research on labor economics, productivity analysis, and human capital study. This paper proposes a new empirical method to measure the gap between the value of a worker's marginal product (VMP) and wage. We first define this gap. The method then aggregates the Mincer-type function of each worker's human capital service to obtain the total labor input of a firm. The semi-log form of total labor input can be inserted into Cobb-Douglas and trans-log type production functions and enable expressing of the production function as a linear form of gap parameters. This linear functional form of production function, if applied to employer-employee matched panel data, can control for firm-level productivity differences that would otherwise cause biases in estimating the gap coefficients. We apply the new method to Japanese employee-employer matched panel data and find that the gap between the VMP and wage is not so large. The traditional way of measurement, in which wage acts as a proxy of worker productivity, could be a rough approximation.
|Date of creation:||May 2012|
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- ODAKI Kazuhiko & KODAMA Naomi, 2010. "Stakeholder-Oriented Corporate Governance and Firm-Specific Human Capital: Wage analysis of employer-employee matched data," Discussion papers 10014, Research Institute of Economy, Trade and Industry (RIETI).
- Pekka Ilmakunnas & Mika Maliranta & Jari Vainiomäki, 2004.
"The Roles of Employer and Employee Characteristics for Plant Productivity,"
Journal of Productivity Analysis,
Springer, vol. 21(3), pages 249-276, May.
- Pekka Ilmakunnas & Mika Maliranta & Jari Vainiomaki, 2000. "The Roles of Employer and Employee Characteristics for Plant Productivity," Econometric Society World Congress 2000 Contributed Papers 1349, Econometric Society.
- repec:oup:qjecon:v:95:y:1980:i:4:p:703-36 is not listed on IDEAS
- Kyoji Fukao & Ryo Kambayashi & Daiji Kawaguchi & Hyeog Ug Kwon & Young Gak Kim & Izumi Yokoyama, 2006. "Deferred Compensation: Evidence from Employer-Employee Matched Data from Japan," Hi-Stat Discussion Paper Series d06-187, Institute of Economic Research, Hitotsubashi University.
- Bruno Crépon & Nicolas Deniau & Sébastien Pérez-Duarte, 2003. "Wages, Productivity and Worker Characteristics : A French Perspective," Working Papers 2003-04, Centre de Recherche en Economie et Statistique.
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