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Collaboration, Stars, and the Changing Organization of Science : Evidence from Evolutionary Biology

Agrawal, Ajay - 2013

We report a puzzling pair of facts concerning the organization of science. The concentration of research output is declining at the department level but increasing at the individual level. For example, in evolutionary biology, over the period 1980 to 2000, the fraction of citation-weighted...

Persistent link: https://www.econbiz.de/10012459010

Have Newer Cardiovascular Drugs Reduced Hospitalization? Evidence From Longitudinal Country-Level Data on 20 OECD Countries, 1995-2003

Lichtenberg, Frank R. - 2008

Countries with larger increases in the share of cardiovascular drug doses that contained post-1990 or post-1995 ingredients had smaller increases in the cardiovascular disease hospital discharge rate, controlling for the quantity of cardiovascular medications consumed per person, the use of...

Persistent link: https://www.econbiz.de/10012464639

Birds of a Feather - Better Together? Exploring the Optimal Spatial Distribution of Ethnic Inventors

Agrawal, Ajay - 2007

We examine how the spatial and social proximity of inventors affects knowledge flows, focusing especially on how the two forms of proximity interact. We develop a knowledge flow production function (KFPF) as a flexible tool for modeling access to knowledge and show that the optimal spatial...

Persistent link: https://www.econbiz.de/10012465834

University Patenting : Estimating the Diminishing Breadth of Knowledge Diffusion and Consumption

Rosell, Carlos - 2006

The rate of university patenting increased dramatically during the 1980s. To what extent did the knowledge flow patterns associated with public sector inventions change as university administrators and faculty seemingly became more commercially oriented? Using a Herfindahl-type measure of patent...

Persistent link: https://www.econbiz.de/10012466021

Does Scientist Immigration Harm US Science? An Examination of Spillovers

Agrawal, Ajay - 2018

The recruitment of foreign scientists enhances US science through an expanded workforce but could also cause harm by displacing better connected domestic scientists, thereby reducing localized knowledge spillovers. We develop a model in which a sufficient condition for the absence of overall...

Persistent link: https://www.econbiz.de/10012453197

The Impact of Public and Private Research Support on Premature Cancer Mortality and Hospitalization in the U.S., 1999-2013

Lichtenberg, Frank R. - 2017

The estimates indicate that cancer sites about which more research-supported articles were published since the 1970s had larger reductions in premature mortality and hospitalization during the period 1999-2013, controlling for the change in the number of people diagnosed. Cancer sites for which...

Persistent link: https://www.econbiz.de/10012455440

Does Knowledge Accumulation Increase the Returns to Collaboration?

Agrawal, Ajay - 2013

We conduct the first empirical test of the knowledge burden hypothesis, one of several theories advanced to explain increasing team sizes in science. For identification, we exploit the collapse of the USSR as an exogenous shock to the knowledge frontier causing a sudden release of previously...

Persistent link: https://www.econbiz.de/10012458968

Has medical innovation reduced cancer mortality?

Lichtenberg, Frank R. - 2010

I analyze the effects of four types of medical innovation and cancer incidence on U.S. cancer mortality rates during …Under the assumption that there were no pre-dated factors that drove both innovation and mortality and that there would … have been parallel trends in mortality in the absence of innovation, the estimates indicate that there were three major …

Persistent link: https://www.econbiz.de/10012462770

Brain Drain or Brain Bank? The Impact of Skilled Emigration on Poor-Country Innovation

Agrawal, Ajay - 2008

The development prospects of a poor country depend in part on its capacity for innovation. The productivity of its …

Persistent link: https://www.econbiz.de/10012464057

Pharmaceutical innovation and the longevity of Australians : a first look

Lichtenberg, Frank R. - 2008

We examine the impact of pharmaceutical innovation on the longevity of Australians during the period 1995-2003. Due to …

Persistent link: https://www.econbiz.de/10012464638