Oct 10 2011 Shuai Niu   Knowledge diffusion vs. technological progress: the optimal strength of IPRs protection   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Apr 18 2007 Arijit Mukherjee and Uday Bhanu Sinha   Knowledge diffusion under patent with asymmetric firms   Abstract  Contact Information  Citation  Full Text  -  Note