By Sullivan Ann   Margaritis Dimitri   in International Journal of Entrepreneurial Behaviour and Research

ISSN:1355-2554|6|5|265-275

Emerald Group Publishing Ltd‎(2000)‎

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By Färe Rolf   Grosskopf Shawna   Margaritis Dimitri   in Journal of Productivity Analysis

ISSN:0895-562X|25|1-2|111-141

Springer Publishing Company ‎(2006)‎

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