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H. Jerome Keisler 《Economic Theory》1995,5(1):127-173
Summary We introduce a probabilistic model for price adjustment in an exchange economy which approximates the classical Walras tâtonnement process while avoiding many of its unrealistic features. The model is decentralized in that the trades permitted to an agent and the resulting price changes depend only on the commodity vector currently held by that agent, and not on the commodity vectors held by the other agents in the economy. Our results will show that the Walras tâtonnement process can be decentralized without changing its behavior on the macroeconomic scale. Our model has a finite set of commodities, a market maker who adjusts prices, and a large finite set of agents who trade only with the market maker. Each agent has a demand function depending on his commodity vector and the price vector. At each discrete time, one agent is chosen at random and exchanges his current commodity vector for his demand vector. Then the market maker adjusts the price vector by an amount which depends on the selected agent's commodity vector and the current price. Prices are adjusted rapidly enough to avoid prolonged trading at the wrong price, but slowly enough so that a substantial price change will depend on a significant simple of agents. The main result shows that with probability arbitrarily close to one the price will rapidly approach and then remain close to an equilibrium value, following a path which is close to the price path of the corresponding tâtonnement process. 相似文献
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Jerome Martin Weingart 《Technological Forecasting and Social Change》1978,12(4):273-315
Over the next hundred years there must be a worldwide transition from reliance on fossil fuels to the use of some combination of long-term and abundant primary sources for the production of heat, electricity, and synthetic fuels. The rate at which such options can be developed and employed, as well as the maximum rate at which they can provide energy at a sustained rate, will place important constraints on the rate and limits to growth of other human activities. It is generally argued that only the fission option, in the form of the fast-breeder and high-temperature reactors, can provide the energy required for a livable world, particularly if this means a world of 10 billion people living at the present energy level of Western Europe. However, a careful examination indicates that the use of solar energy, through a menu of technological options, can provide the needs of a world at this scale of energy use, and that this can be accomplished within the constraints of land availability and requirements for energy, materials, and labor. No scientific breakthroughs are required, although a number of these would be helpful, but very substantial engineering advances are required, and the transition of such a world-wide system would take no less than a century. However, the feasibility of such large-scale use of solar energy will substantially alter those aspects of the “limits to growth” discussions in which future growth strategies are constrained by available and acceptable energy alternatives. This paper outlines a global solar-energy system considered feasible for more than 10 billion people living at 5 kW per capita. 相似文献
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Opportunity recognition is vital for small and medium-sized enterprises (SMEs), but SMEs face challenges in capturing recognized opportunities. Given that opportunity recognition does not automatically lead to higher SME performance and that SMEs need to take appropriate actions to exploit recognized opportunities to achieve better performance, it is imperative to explore the mediators that enable SMEs to translate opportunity recognition into higher performance. This study proposes that business model innovation may be a key conduit through which opportunity recognition affects SME performance. Based on a dataset of 155 SMEs, we find that the positive relationship between opportunity recognition and SME performance is mediated by business model innovation. These findings not only aid SMEs in accomplishing the performance effect of opportunity recognition, but also provide some insights into the implications of business model innovation. 相似文献
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Tomáš Havránek T. D. Stanley Hristos Doucouliagos Pedro Bom Jerome Geyer-Klingeberg Ichiro Iwasaki W. Robert Reed Katja Rost R. C. M. van Aert 《Journal of economic surveys》2020,34(3):469-475
Meta-analysis has become the conventional approach to synthesizing the results of empirical economics research. To further improve the transparency and replicability of the reported results and to raise the quality of meta-analyses, the Meta-Analysis of Economics Research Network has updated the reporting guidelines that were published by this Journal in 2013. Future meta-analyses in economics will be expected to follow these updated guidelines or give valid reasons why a meta-analysis should deviate from them. 相似文献
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Jerome J. TobacykBarry J. Babin Jill S. AttawayStanislaw Socha David ShowsKevin James 《Journal of Business Research》2011,64(9):944-950
The research applies the Material Values Scale (MVS; Richins and Dawson, 1992) cross-culturally by comparing materialism among Polish and American business students. Cultural differences (e.g., greater humanistic/collectivistic/Christian values in Poland) suggest lower MVS scores for Poles than for Americans. This prediction is consistent with the Local Culture hypothesis (i.e., that a strong local culture results in maintenance of traditional values in defense against global forces). Contrary to predictions, data suggest no Polish-American materialism differences, a finding consistent with the globalization hypothesis (i.e., increasing globalization leads to relatively uniform worldwide materialism). As a precursor to hypotheses testing, confirmatory factor analysis (CFA) tests the construct validity and cross-cultural validity of the MVS. The findings suggest substantial difficulties with the scale that limit the confidence in conclusions based on the scale. Based on these findings, future research discussion aims at developing a measure of materialism with potentially greater construct validity for cross-cultural applications. 相似文献
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As today’s world is flattening, the landscape of tourist destinations is becoming similar. In turn, an increasing number of destinations are seeking to effectively promote themselves. For these reasons, this study investigated the differences in the advertising effectiveness of destination promotions by message appeal and endorsement type. The main objective of the study was to compare the effectiveness of destination advertising by message appeal types and endorsement types respectively in order to determine the most effective type of advertising for promoting a destination. A questionnaire with hypothetical website advertising designs was used in a survey of inbound tourists to Korea of three different nationalities. To examine differences between the two advertising appeal types according to the type of offer, a series of t-tests were performed, whereas general linear model tests with repeated measures were carried out to detect the differences among the three endorsement types. The results revealed destination advertising effectiveness vary by both advertising appeal type and endorsement type. Such effectiveness was also found to vary by the message recipient’s cultural background. For destination marketers, these findings shed light on the importance of a well-curated message design by message appeal type and endorsement type. 相似文献
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A re-analysis of two national telephone surveys found that black–white differences in awareness that it is customary to tip a percentage of the bill declined as socio-economic status increased. However, black–white differences in awareness that is customary to tip 15–20 percent in restaurants was unrelated to socio-economic status. The practical as well as theoretical implications of these findings are discussed along with directions for future research. 相似文献