Showing 1 - 10 of 33
Introduction /Petra Moser --The roots of agricultural innovation : patent evidence of knowledge spillovers /Matthew … Meyers, Paul W. Rhode --Comment /Michael J. Roberts --Local effects of land grant colleges on agricultural innovation and …, more resilient crops to feed a more crowded planet in the twenty-first century. Innovation has historically helped …
Persistent link: https://www.econbiz.de/10012484895
tolerance under the New Deal to investigate the effects of pools on innovation within 20 industries. Difference … discourage innovation by weakening competition to improve substitutes …
Persistent link: https://www.econbiz.de/10012460347
Persistent link: https://www.econbiz.de/10001594701
This paper examines variations in stature and the Body Mass Index (BMI) across space for the United States in 1917/18, using published data on the measurement of approximately 890,000 recruits for the American Army for World War I. It also connects those anthropometric measurements with an index...
Persistent link: https://www.econbiz.de/10012471325
How do children affect women in science? We investigate this question using rich biographical data, linked with patents and publications, for 83,000 American scientists in 1956 at the height of the baby boom. Our analyses reveal a unique life-cycle pattern of productivity for mothers. While...
Persistent link: https://www.econbiz.de/10012660113
The U.S. fertility transition in the nineteenth century is unusual. Not only did it start from a very high fertility level and very early in the nation's development, but it also took place long before the nation's mortality transition, industrialization, and urbanization. This paper assembles...
Persistent link: https://www.econbiz.de/10012481216
This paper deals with the issue of using infant and childhood mortality as an indicator of inequality. The case is that of the United States in the 20th century. Using microdata from the 1900 and 1910 Integrated Public Use Microsamples (IPUMS), published data from the Birth Registration Area in...
Persistent link: https://www.econbiz.de/10012462523
Over the course of the nineteenth century manufacturing in the United States shifted from artisan shop to factory production. At the same time United States experienced a "transportation revolution", a key component of which was the building of extensive railroad network. Using a newly created...
Persistent link: https://www.econbiz.de/10012464237
All nations that can be characterized as developed have undergone the demographic transition from high to low levels of fertility and mortality. Most presently developed nations began their fertility transitions in the late nineteenth or early twentieth centuries. The United States was an...
Persistent link: https://www.econbiz.de/10012466091
Most of the estimated effects are small and the signs are not wholly consistent with either model, under the null hypothesis that agriculture was the chief beneficiary of rail access. For example, we find that rail access appears to have increased urbanization, raised the likelihood of...
Persistent link: https://www.econbiz.de/10012466284