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A Time to Sow and a Time to Reap: Growth Based on General Purpose Technologies

Helpman, Elhanan; Trajtenberg, Manuel - National Bureau of Economic Research (NBER) - 1994

We develop a model of growth driven by successive improvements in 'General Purpose Technologies' (GPT's), such as the steam engine, electricity, or micro-electronics. Each new generation of GPT's prompts investments in complementary inputs, and impacts the economy after enough such compatible...

Persistent link: https://www.econbiz.de/10005248840

The Meaning of Patent Citations: Report on the NBER/Case-Western Reserve Survey of Patentees

Jaffe, Adam; Trajtenberg, Manuel; Fogarty, Michael S. - National Bureau of Economic Research (NBER) - 2000

A survey of recent patentees was conducted to elicit their perceptions regarding the importance of their inventions, the extent of their communication with other inventors, and the relationship of both importance and communication to observed patent citations. A cohort of 1993 patentees were...

Persistent link: https://www.econbiz.de/10005710621

Flows of Knowledge from Universities and Federal Labs: Modeling the Flowof Patent Citations Over Time and Across Institutional and Geographic Boundari

Jaffe, Adam; Trajtenberg, Manuel - National Bureau of Economic Research (NBER) - 1996

The extent to which new technological knowledge flows across institutional and national boundaries is a question of great importance for public policy and the modeling of economic growth. This paper develops a model of the process generating subsequent citations to patents as a lens for viewing...

Persistent link: https://www.econbiz.de/10005714300

The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools

Hall, Bronwyn H; Jaffe, Adam; Trajtenberg, Manuel - National Bureau of Economic Research (NBER) - 2001

This paper describes the database on U.S. patents that we have developed over the past decade, with the goal of making it widely accessible for research. We present main trends in U. S. patenting over the last 30 years, including a variety of original measures constructed with citation data,...

Persistent link: https://www.econbiz.de/10005830003

Empirical Studies of Innovation in the Knowledge Driven Economy

Hall, Bronwyn H; MAIRESSE, Jacques - National Bureau of Economic Research (NBER) - 2006

innovation and knowledge management and their impact on performance at the firm level for a number of countries. These studies … have been conducted using data drawn from innovation surveys combined with data from a number of other sources. The issue … illustrates the value of these surveys in improving our understanding of innovation in firms and raises a number of questions for …

Persistent link: https://www.econbiz.de/10005050393

Innovation in Israel 1968-97: A Comparative Analysis Using Patent Data

Trajtenberg, Manuel - National Bureau of Economic Research (NBER) - 1999

the israeli economy in the nineties and beyond. In this paper we present a close-up portrait of innovation in Israel for …

Persistent link: https://www.econbiz.de/10005580793

Quality-Adjusted Prices for the American Automobile Industry: 1906-1940

Trajtenberg, Manuel; Raff, Daniel M.G. - National Bureau of Economic Research (NBER) - 1995

innovation and only 40% to product innovation or quality change per se. Regressors representing mechanical systems matter in …

Persistent link: https://www.econbiz.de/10005589014

Measuring the Returns to R&D

Hall, Bronwyn H; MAIRESSE, Jacques; Mohnen, Pierre - National Bureau of Economic Research (NBER) - 2009

We review the econometric literature on measuring the returns to R&D. The theoretical frameworks that have been used are outlined, followed by an extensive discussion of measurement and econometric issues that arise when estimating the models. We then provide a series of tables summarizing the...

Persistent link: https://www.econbiz.de/10008624599

Under the Thumb of History? Political Institutions and the Scope for Action

Duflo, Esther; Banerjee, Abhijit - National Bureau of Economic Research (NBER) - 2014

This paper discusses the two leading views of history and political institutions. For some scholars, institutions are mainly products of historical logic, while for others, accidents, leaders, and decisions have a significant impact. We argue that while there is clear evidence that history...

Persistent link: https://www.econbiz.de/10010951199

Peer Effects, Teacher Incentives, and the Impact of Tracking: Evidence from a Randomized Evaluation in Kenya

Duflo, Esther; Kremer, Michael; Dupas, Pascaline - National Bureau of Economic Research (NBER) - 2008

To the extent that students benefit from high-achieving peers, tracking will help strong students and hurt weak ones. However, all students may benefit if tracking allows teachers to present material at a more appropriate level. Lower-achieving pupils are particularly likely to benefit from...

Persistent link: https://www.econbiz.de/10005248909