This paper documents a shift in the nature of innovation in the information technology (IT) industry. Using comprehensive data on all IT patents granted by the USPTO from 1980-2002, we find strong evidence of a change in IT innovation that is systematic, substantial, and increasingly dependent...

Although Norway's information-technology (IT) industry has never been an international success, it has been a critical factor in the country's economy over the past thirty years. Several IT companies came close to reaching a global scale, but escalating costs finally prevented them from doing...

This paper documents a shift in the nature of innovation in the information technology (IT) industry. Using comprehensive data on all IT patents granted by the USPTO from 1980-2002, we find strong evidence of a change in IT innovation that is systematic, substantial, and increasingly dependent...