Innovation processes within corporations increasingly tap into international technology sources, yet little is known … about the relative contribution of different types of innovation channels. We investigate the effectiveness of different …

Innovation processes within corporations increasingly tap into international technology sources, yet little is known … about the relative contribution of different types of innovation channels. We investigate the effectiveness of different …

Innovation processes within corporations increasingly tap into international technology sources, yet little is known … about the relative contribution of different types of innovation channels. We investigate the effectiveness of different …-how. -- technology sourcing ; knowledge spillovers ; productivity ; open innovation …

We study the blocking effect of patents on follow-on innovation by others. We posit that follow-on innovation requires … freedom to operate (FTO), which firms typically obtain through a license from the patentee holding the original innovation …. Where licensing fails, follow-on innovation is blocked unless firms gain FTO through patent invalidation. Using large …