(2006). The effects of entry on incumbent innovation and productivity. National Bureau of Economic Research.
Chicago-Zitierstil (17. Ausg.)The Effects of Entry on Incumbent Innovation and Productivity. Cambridge, Mass: National Bureau of Economic Research, 2006.
MLA-Zitierstil (9. Ausg.)The Effects of Entry on Incumbent Innovation and Productivity. National Bureau of Economic Research, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.