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Water temperature is an important factor affecting aquatic life within the stream environment. Cold water species, such as salmonids, are particularly susceptible to elevated water temperatures. This paper examines the economic value of short‐term water temperature forecasts for salmonid management. Forecasts may have economic value if they allow the water resource manager to make better water allocation decisions. This study considers two applications: water releases for management of Chinook salmon in the Klamath River and leasing water from agriculture for management of steelhead trout in the John Day River. We incorporate biophysical models and water temperature distribution data into a Bayesian framework to simulate changes in fish populations and the corresponding benefit from recreational fishing and opportunity cost of water under different temperature forecast accuracies. Simulation results indicate that use of the forecasts results in increased fish production and that marginal costs decline and net benefits increase as forecast accuracy increases, suggesting that provision and use of such stream temperature forecasts would have value to society. (JEL Q22, Q25, Q28, Q50) 相似文献
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People's self‐regulatory focus may determine the effectiveness of stop‐smoking campaigns. An experiment with 226 young smokers investigated the persuasiveness of different emotional appeals for different self‐regulatory foci. A congruency effect emerges for attitude toward the advertisement and behavioral intentions: Young smokers with a promotion focus are more persuaded by sadness–joy than fear–relief campaigns, and the opposite is true for those with a prevention focus. As predicted by the regulatory relevancy principle, ad involvement mediates this effect. 相似文献
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Organ transplantation holds the potential to substantially restore the health of many otherwise terminally ill patients. That potential, however, is currently being denied full realization by a chronic and severe shortage of cadaveric organs that are made available for this use. In recent years, medical practitioners, social scientists, and others have debated the virtues of allowing markets for cadaveric organs to form as a way to end the current shortage. In this debate, market opponents have argued, inter alia, that (1) organ collections may fall with payment of positive prices and (2) the price required to equilibrate organ supply and demand would be high. On the other hand, proponents of organ markets have argued that financial inducements could save many lives and that the equilibrium price is likely to be low. While dozens of papers have been published debating this issue, to date no one has provided any empirical evidence to resolve these important questions of supply. This paper provides preliminary evidence suggesting that potential donors would be relatively responsive to financial inducements and, accordingly, that the price required to eliminate the current shortage of organs is surprisingly low. (JEL 118, L50) 相似文献
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We employ extensive information on bank deposit rates and area migration patterns to examine pricing relationships implied by switching costs. We argue that, because of the trade‐off between attracting new customers and exploiting old ones, banks offer higher deposit rates in areas experiencing more in‐migration. Further, because greater out‐migration implies that a locked‐in customer will not be with the bank for as many periods, banks will offer lower deposit rates in areas exhibiting greater out‐migration. Also, because this effect of out‐migration logically depends on the extent of in‐migration, an interaction effect exists. We find evidence strongly supporting these relationships. 相似文献
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The factors affecting age of hiring are estimated using Australian establishment data. Lower ages of new hires are associated with training and with workplaces using steeper tenure–wage profiles. Lower ages of hires are associated with steeper profiles throughout the age of hire distribution, whereas lower ages of hires are associated with the provision of training only among younger hires. Moreover, the evidence confirms that larger employers are more likely to hire younger workers but that lower ages of hire continue to be associated with steeper tenure–wage profiles even among larger employers. The robust role of the tenure–wage profile suggests that it is too early to conclude, as some have, that specific training is the paramount reason for the reduced hiring prospects of the old. 相似文献
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