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VALUE OF IMPROVED LONG-RANGE WEATHER INFORMATION   总被引:1,自引:0,他引:1  
An important human welfare implication of climate involves effects of interannual variation in temperature and precipitation on agriculture. Year-to-year variations in U.S. climate result from El Niño-Southern Oscillation (ENSO), a quasi-periodic redistribution of heat and momentum in the tropical Pacific Ocean. The study described here represents a preliminary assessment of the value to the entire U.S. agricultural sector of improved ENSO forecasts in the southeastern United States. This interdisciplinary assessment combines data and models from meteorology, plant sciences, and economics under a value of information framework based on Bayesian decision theory. An economic model of the U.S. agricultural sector uses changes in yields for various ENSO phases to translate physical (yield) effects of ENSO changes into economic effects on producers and on domestic and foreign consumers. The value of perfect information to agriculture is approximately $145 million. The economic value of an imperfect forecast is $96 million. These results suggest that increases in forecast accuracy have substantial economic value to agriculture.  相似文献   
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Our research takes an exhaustive approach to measurement issues in price index construction for the BLS airfare index. We pursue a number of the objectives for dealing with the biases that the 1997 CPI Commission recommended and detail a protocol for data collection and analysis that can be replicated and can be enhanced by availability of additional data sources. We find an upward bias in the BLS airfare index over the period considered. However, because of issues of practicality and implementability of the methods we utilize in our analysis, the goals of the Commission recommendations remain illusive and problematic in being more broadly applied to other components of the CPI.  相似文献   
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We construct a trade theoretic model of skill formation with skill as a produced intermediate input. Capital is required for production as well as for education which transforms unskilled labor into skilled. We use this model to reflect analytically on India's rising requirement of skilled manpower. We show that even if growth of capital and supply of skilled manpower match, relative stagnation of unskilled manufacturing sector will magnify the gap between growth in demand and supply of skill. This may happen, for example, if there is a vast pool of workforce who may not have even the basic education to qualify as “unskilled” and excessive capital flows into the skilled sector. Thus a country with lack of education at a very basic level will be forced to import skilled manpower from the rest of the world.  相似文献   
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