TY - Front. Econ. China A1 - KOU Zonglai, ZHANG Jian T1 - Endogenous licensing in cumulative innovation Y1 - 2007-09-05 JF - Frontiers of Economics in China JO - Front. Econ. China SP - 424 EP - 457 VL - 2 IS - 3 UR - https://academic.hep.com.cn/fec N1 - 10.1007/s11459-007-0022-0 ER -