| 000 | 00521pam a2200181a 44500 | ||
|---|---|---|---|
| 008 | 170807b1997 xxu||||| |||| 00| 0 eng d | ||
| 020 | _a | ||
| 082 | _a6104 | ||
| 100 | _aKortum, Samuel | ||
| 245 | _aStronger protection or technological revolution: What is behind the recent surge in patenting? | ||
| 260 |
_aCambridge, MA _bNBER _c1997 |
||
| 300 | _a57 + figs. | ||
| 490 | _aWorking Paper Series | ||
| 700 | _aLerner Josh | ||
| 700 | _aNational Bureau Of Economic Research | ||
| 906 | _a38906 | ||
| 942 |
_2ddc _cG |
||
| 999 |
_c131293 _d131293 |
||