Study of the Relationship between Concentration, Skilled Labor and Efficiency Using the Fuzzy Logic Approach in Iranian Manufacturing Industries

Document Type : Original Article

Authors

1 Department of Industrial Engineering, Islamic Azad University, Zahedan, Iran.

2 Department of Economics, University of Sistan and Baluchestan, Zahedan, Iran.

Abstract

The central goal of this research is to investigate the relationship between concentration ratio, skilled labour and efficiency in Iranian manufacturing industries. In order to measure the technical efficiency, we use the stochastic frontier analysis (SFA) method and data related to 131 of industries at 4-digit level of ISIC code during 1996-2009. To achieve the aim of study, we develop an analytical framework based on the fuzzy logic. Results suggest that there is a positive relationship between efficiency and skilled labour, while the concentration index has negative impact on industry's efficiency.

Keywords


Abonouri, E., Ghulami, N., (2008), "Estimation and comparison of the concentration ratio in Iranian industries using Lognormal model", Quarterly Journal of Economic Reviews, Issue 1, pp. 111-134. (In Persian)
Bakhshi, L., (2003), "Measuring the concentration in Iranian cement industry, Trade Studies Quarterly", No. 26, pp. 75-96. (In Persian)
Farivar, L., (2003), "Evaluation of technical inefficiency in Iranian major industry subdivisions (Panel data approach)", Trade Studies Quarterly, No. 26, pp121-143. (In Persian)
Hakimi Pour, N., Hazhbar Hiani, K., (2008), "A comparative analysis of the efficiency of large industries in the Iranian provinces using stochastic frontier function approach", Journal of Knowledge and Development, No. 24. (In Persian)
Issazadeh, S., Shaeri, Z., (2011), "Market structure and efficiency of the banking system, the study of Middle Eastern and North African countries", Journal of Economic Sciences, No. 12, pp63-84. (In Persian)
Karimi, M., (2002), "Evaluating the efficiency of the various branches of the agricultural Bank and determination of the factors influencing it (case study of Hamedan province)", MA thesis in Economics, Tehran University. (In Persian)
Khodadad Kashi, F., (2010), "Monopoly, competition and concentration in Iranian industrial markets (1988-94)", Trade Studies Quarterly, 4 (15): 83-116. (In Persian)
Khodadad Kashi, F., (2012),"Analysis of the impact of market structure on productivity of Iranian industries", Quarterly Journal of Economic Research and Policies, No. 63, pp5-32. (In Persian)
Malekan, J., (2011), "Investigating the impacts of concentration ratio and economies of scale on profitability in Iranian industrial sector", Journal of Economic researches trend, 19th year, No. 5. (In Persian)
Ranjbar, H., Sameti, M., Aghaei, K., and Bajoghli, S., (2007), "Estimating the frontier cost function and measuring the efficiency of central banks (a case study of Iran and selected countries)", Economic Trends, issues 52 and 53, pp85-111. (In Persian)
Shahiki Tash, M N., (2003), "Investigating the market structure of selected export goods and its impact on the Iranian foreign exchange earnings", MA thesis in Economics, Tehran University. (In Persian)
Shahiki Tash, M N., (2011), "Evaluation of Iranian industries’ Structure", National Center of competition affiliated to the presidential institution. (In Persian)
Shahiki Tash, M N., Nasiri Aghdam, A., (2011), "Concentration, intensity of barrier to entry and economies of scale in Iranian water cooler industry and welfare cost of the effective structure", Quarterly Journal of Quantitative Economics, 8 (1): 73-98. (In Persian)
StatisticalCenter of Iran, (1999), The results of surveys of industrial workshops with 10 and more employee.
Yousefi Haji Abad, R., khodadad Kashi, F., Zarra'nezhad, M., (2012), "Assessment of technical efficiency in Iranian manufacturing industries", Quarterly Journal of quantitative Economics (former economic studies), Vol. 9, No. 2, pp31-48. (In Persian)
Aigner, D.J., Lovell, C.A.K. and Schmidt, P., (1977), "Formulation and estimation of stochastic frontier production function models", Journal of Econometrics, Vol. 6, pp21-37.
Allen, A.J. and S. Shaik., (2006), "Performance of the Agricultural Commodity Trucking Sector in the United States", Paper presented at the South western Economics Association Annual Meeting, March 23-26, New Orleans, LA.
Baten Md.A., A. Kamil and M.A. Haque, (2009), "Modelling technical inefficiencies effects in a stochastic frontier production function for panel data", African Journal of Agricultural Research Vol. 4 (12), pp1374-1382.
Bhattacharya, M. (2002), "Industrial Concentration and Competition in Malaysian Manufacturing", Applied Economics, Vol. 34, pp2127-2134.
Gumbau, M. and Maudos, J., (2000), "Profitability, Market Structure And Efficiency: An Application To The Spanish Industry", working papers, SerieEC 98-0895InstitutoValenciano de Investigaciones Economicas, S.A. (Ivie).
Kari, F., Abdul H.J., Albert J.A, and Warren C., (2002), "Market Structure, Market Share, and Profits in the Surface Freight Industry", Paper presented at the American Agricultural Economics Association Long Beach, CA, July 28-31.
Maudos, Joaquin., (1998), "Market structure and performance in Spanish banking using a direct measure of efficiency", Applied Financial Economics, 1998, Vol. 8, pp191-200.
Meeusen, W. and J. van den Broeck., (1977), "Efficiency Estimation from Cobb-Douglas Production Functions with Composed Error", International Economic Review 18, 435-444.