Feb 17 2012 Cesare Imbriani , Piergiuseppe Morone , Rosanna Pittiglio and Filippo Reganati   Agglomeration economies, local cluster and foreign direct investments a pilot study for Emilia Romagna region   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Oct 10 2011 Shuai Niu   Knowledge diffusion vs. technological progress: the optimal strength of IPRs protection   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result