Packalen, Mikko; Bhattacharya, Jay - National Bureau of Economic Research (NBER) - 2012
established knowledge. When recent advances create superior opportunities for invention, their adoption as research inputs in the … limited, due to the undeveloped nature of new knowledge, quick obsolescence of fast-improving knowledge, and the vast scope of … the existing knowledge base. In this paper, we first develop a new approach to identifying research inputs in invention …