نتایج جستجو برای: technological change is machinery

تعداد نتایج: 7483604  

Journal: :Frontiers in Environmental Science 2023

This paper decomposes agricultural input factors into labor, land, fertilizer, and farm machinery in 31 provinces of China from 1990 to 2020. analyzes the factor’s contribution rates China’s growth using stochastic frontier model. The empirical results indicate that rate has weakened, with decreasing an increasing fertilizer machinery, land year by year. technological progress is increasing, th...

1997
Nathan Rosenberg Victor Fuchs Ralph Landau Roberto Mazzoleni Richard Nelson Richard Rosenbloom

I would like to begin with two generally accepted propositions: First, technological change is a major ingredient of long-term economic growth, and second, technological change is characterized by a high degree of uncertainty. Understanding the nature of these uncertainties and the obstacles to surmounting them is not a trivial matter. Rather, it goes to the heart of how new technologies are de...

1990
Paul M. Romer

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1998
Robert D. Atkinson

The United States is in the midst of a technological revolution, driven in large part by rapid advances in microelectronics. There has been much speculation about the impacts of the “information superhighway” on society as a whole, but surprisingly little is known about the potential effects of this technology revolution on the spatial distribution of jobs and people either broadly or in urban ...

2016
Junghoon Lee

This paper considers a technological change that can be utilized only by production units adapting to the new technology. A simple firm dynamics model is used to show such an innovation enhances reallocation, whereas a technological advance that is available to all production units does not. This implication is used in structural vector autoregressions to study the driving force behind cyclical...

2000
Carol Corrado Boyan Jovanovic Plutarchos Sakellaris Daniel J. Wilson

We estimate the rate of embodied technological change directly from plant-level manufacturing data on current output and input choices along with histories on their vintages of equipment investment. Our estimates range between 8 and 17 percent for the typical U.S. manufacturing plant during the years 1972-1996. Any number in this range is substantially larger than is conventionally accepted wit...

Journal: :College & Research Libraries 1988

Journal: :int. journal of mining & geo-engineering 2014
shamseddin vahabi abolghasem mahdavi jafar ebadi

adopting a policy and deciding on long-term investment in the mining industry by a government orprivate sector actors depends strongly on the ability to predict the scarcity of mineral reserves. changein scarcity of mineral reserves is a function of several technological and non-technological factors.among them, change in technology is the most significant factor affecting scarcity. this paper ...

Journal: :Journal of Political Economy 1990

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