共 20 条
[5]
Innovation in the service sector and the role of patents and trade secrets: Evidence from Japanese firms[J] . Masayuki Morikawa.Journal of The Japanese and International Economi . 2018
[6]
Dynamic models of R & D, innovation and productivity: Panel data evidence for Dutch and French manufacturing[J] . Wladimir Raymond,Jacques Mairesse,Pierre Mohnen,Franz Palm.European Economic Review . 2015
[7]
The Choice between Formal and Informal Intellectual Property: A Review[J] . Journal of Economic Literature . 2014 (2)
[8]
What Happens When Firms Patent? New Evidence from U.S. Economic Census Data[J] . Natarajan Balasubramanian,Jagadeesh Sivadasan.The Review of Economics and Statistics . 2011 (1)
[9]
Innovation and productivity in SMEs: empirical evidence for Italy[J] . Bronwyn H. Hall,Francesca Lotti,Jacques Mairesse.Small Business Economics . 2009 (1)