R&D efficiency and barriers to entry: a two stage semi-parametric DEA approach
| Autor: | Cullmann, Astrid, Schmidt-Ehmcke, Jens, Zloczysti, Petra |
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| Zdroj: | Oxford Economic Papers, 2012 Jan 01. 64(1), 176-196. |
| Databáze: | JSTOR Journals |
| Externí odkaz: |
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| Autor: | Cullmann, Astrid, Schmidt-Ehmcke, Jens, Zloczysti, Petra |
|---|---|
| Zdroj: | Oxford Economic Papers, 2012 Jan 01. 64(1), 176-196. |
| Databáze: | JSTOR Journals |
| Externí odkaz: |
|