| 000 | 00669pam a2200193a 44500 | ||
|---|---|---|---|
| 999 |
_c102628 _d102628 |
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| 008 | 170807b2015 xxu||||| |||| 00| 0 eng d | ||
| 100 | _aHall, Bronwyn H | ||
| 110 | _aNational Bureau of Economic Research | ||
| 245 |
_aTechnology entry in the presence of patent thickets / _cBronwyn H. Hall, Christian Helmers and Georg von Graevenitz |
||
| 260 |
_aCambridge _bNBER _c2015 |
||
| 300 | _a50p | ||
| 490 |
_aNBER Working Paper ; _v21455 |
||
| 650 | _aNBERWP 21455 | ||
| 650 | _aE15288.pdf | ||
| 700 | _aHelmers, Christian | ||
| 700 | _aGraevenitz, Georg Von | ||
| 856 | _uhttp://elibrary.igidr.ac.in/e-library/working papers/NBER/2015/E15288.pdf | ||
| 942 |
_2ddc _cE |
||