APA
Sampat B., National Bureau of Economic Research & Williams H. L. (2015). How do patents affect follow-on innovation?. Cambridge: NBER.
Chicago
Sampat Bhaven, National Bureau of Economic Research and Williams Heidi L. 2015. How do patents affect follow-on innovation?. Cambridge: NBER.
Harvard
Sampat B., National Bureau of Economic Research and Williams H. L. (2015). How do patents affect follow-on innovation?. Cambridge: NBER.
MLA
Sampat Bhaven, National Bureau of Economic Research and Williams Heidi L. How do patents affect follow-on innovation?. Cambridge: NBER. 2015.