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

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

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Article ID: iaor20102620
Volume: 61
Issue: 4
Start Page Number: 647
End Page Number: 657
Publication Date: Apr 2010
Journal: Journal of the Operational Research Society
Authors: ,
Keywords: market share model
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.

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