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Do market share and efficiency matter for each other? An application of the zero-sum gains data envelopment analysis

Jin-Li Hu () and Chin Yi Fang ()

Journal of the Operational Research Society, 2010, vol. 61, issue 4, 647-657

Abstract: Abstract Current studies that use traditional data envelopment analysis (DEA) neglect the 100% market share restriction. This study adopts zero-sum gains data envelopment analysis to measure the efficiency scores of securities firms (SFs) and indicates that the traditional DEA model underestimates the efficiency scores of inefficient SFs. This research analyses 266 integrated securities firms in Taiwan from 2001 to 2005 and employs three inputs (fixed assets, financial capital, and general expenses) and a single output (market share). The foreign-affiliated ownership of SFs positively affects the efficiency scores. The two-stage least squares procedure confirms that the market share and efficiency score simultaneously reinforce each other.

Keywords: zero-sum gains data envelopment analysis (ZSG-DEA); panel data; two-stage least squares procedure (2SLS) (search for similar items in EconPapers)
Date: 2010
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