TY  - BOOK
AU  - Kortum, Samuel
AU  - Lerner Josh
AU  - National Bureau Of Economic Research
TI  - Stronger protection or technological revolution: What is behind the recent surge in patenting?
T2  - Working Paper Series
U1  - 6104 
PY  - 1997///
CY  - Cambridge, MA
PB  - NBER
ER  -