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141.
We consider an economic model that features (1) a continuum of agents and (2) an aggregate state of the world over which agents have an infinitesimal influence. We first review the connections between the ??eductive?? viewpoint on expectational stability and standard game-theoretical rationalizability concepts. The ??eductive?? reasoning selects different plausible beliefs that are a priori, and possibly a posteriori, ??diverse??. Such beliefs are associated with the sets of ??Cobweb tatonnement?? outcomes, ??Rationalizable States?? and ??Point-Rationalizable States?? (the latter two being shown to be convex). In the case where our model displays strategic complementarities, unsurprisingly, all our ??eductive?? criteria support similar conclusions, particularly when the equilibrium is unique. With strategic substitutabilities, the success of expectational coordination, in the case where a unique equilibrium does exists, relates with the absence of cycles of order 2 of the ??Cobweb?? mapping: in this case, full expectational coordination would be achieved. However, when cycles of order 2 do exist, our different criteria predict larger sets of outcomes, although all tied with cycles. Under differentiability assumptions, the Poincaré?CHopf method leads to other global stability results. At the local level, the different criteria under scrutiny can be adapted. They lead to the same expectational stability conclusions, only when there are local strategic complementarities or strategic substitutabilities. However, for the local stability analysis, it is demonstrated that the stochastic character of expectations can most often be forgotten. 相似文献
142.
Our introduction to this compendium reviews Alfred Kahn’s academic and policy interests, his activities as a regulator and advisor to governments and companies, and the interactions between these aspects of his life as an economist. Although best known for his research on the economics of regulation and his application of microeconomic principles in his role as a regulator and advisor, Kahn’s academic research portfolio was much more diverse. He wrote about patent policy, economic development, antitrust policy, and other topics, in addition to his work on regulation and deregulation. Even before becoming a regulator he was actively involved in applying economic principles to regulatory problems as an advisor and consultant. In all of his work Kahn recognized that markets were imperfect, but that policies aimed at improving market performance often made things worse. His experience as a regulator and consultant strengthened his recognition that the costs of imperfect regulation had to be carefully balanced against the costs of imperfect markets. One had to search for the best that could be done in an imperfect world. Kahn was particularly fascinated by the challenges of designing and implementing policies to govern the transition from regulated monopoly or oligopoly to an industry that would ultimately rely primarily on competitive markets to govern firm behavior and performance. Fred Kahn was an extraordinary man who is missed greatly by his many friends and colleagues representing a wide range of political orientations and approaches to economic and public policy analysis. 相似文献
143.
Roger S. Hewett 《The Journal of economic education》2013,44(4):425-435
The changing scope and approaches in the public finance courses as reflected in a spectrum of undergraduate texts are reviewed. The major texts are examined for content, difficulty, and ideology. 相似文献
144.
Alice H.Y. Hon Roger B. Rensvold 《International Journal of Human Resource Management》2013,24(5):959-982
This study examines the influence of individual needs and task characteristics on a multifaceted definition of perceived empowerment using an interactional perspective. Respondents were Hong Kong Chinese employees and most of them lower-level or nonmanagerial level workers in business organizations. We used regression analyses to test a number of hypotheses informed by social psychology theories. The significant findings indicate that perceived empowerment is predicted by individual characteristics (need for achievement, need for power), task situations (receipt of task feedback, competency-based reward system, participation in goal setting) and their interactions. Limitations of the study and implications for future research are discussed. 相似文献
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147.
We develop a one-period model of investor asset holdings whereinvestors have heterogeneous preference for skewness. Introducingheterogeneous preference for skewness allows the model's investors,in equilibrium, to underdiversify. We find support for our model'sthree key implications using a dataset of 60,000 individualinvestor accounts. First, we document that the portfolio returnsof underdiversified investors are substantially more positivelyskewed than those of diversified investors. Second, we showthat the apparent mean-variance inefficiency of underdiversifiedinvestors can be largely explained by the fact that investorssacrifice mean-variance efficiency for higher skewness exposure.Furthermore, we show that idiosyncratic skewness, and not justcoskewness, can impact equilibrium prices. Third, the underdiversificationof investors does not appear to be coincidentally related toskewness. Stocks most often selected by underdiversified investorshave substantially higher average skewnessespeciallyidiosyncratic skewnessthan stocks most often selectedby diversified investors. 相似文献
148.
Abstract. In the literature on the welfare effects of free trade under imperfect competition, one important case seems to have been overlooked, and that is the Bertrand duopoly model with differentiated products. Although many authors have analysed the welfare effects of free trade under Cournot duopoly and demonstrated the possibility of losses from trade, there has been no thorough analysis of the welfare effects of free trade under Bertrand duopoly. In this article we present a thorough analysis of the welfare effects of free trade under Bertrand duopoly with differentiated products, and it is shown that there are always gains from trade. JEL Classification: F12 相似文献
149.
150.
Roger Lagunoff 《The Review of economic studies》2001,68(1):109-132
Why would potentially intolerant majorities in a democracy protect the rights of unpopular groups? This paper models the formation of legal standards that determine the extent of civil liberty in a society. It is shown that tolerant legal standards emerge over time, despite all individuals having intolerant preferences. Each period citizens choose activities that have social consequences. A majority vote determines which of these activities are legally protected. Because of errors in interpreting the symbolic content of these activities, voters from the majority will not impose excessively intolerant standards, otherwise they may end up severely punishing members of their own group by mistake.
Extending this framework to a dynamic model, we examine Markovian equilibria of the game when government improves with time in its ability to correctly interpret citizens' activities. These improvements allow an unchanging majority to impose increasingly intolerant standards over time. It is shown that societies with high political turnover due to population changes are apt to choose tolerant legal standards. Societies with low turnover are more apt to choose more intolerant and unstable ones. Each group seeks to prevent auditing capabilities of government from improving too much over time in order to prevent future majorities from successfully enforcing more intolerant standards. 相似文献
Extending this framework to a dynamic model, we examine Markovian equilibria of the game when government improves with time in its ability to correctly interpret citizens' activities. These improvements allow an unchanging majority to impose increasingly intolerant standards over time. It is shown that societies with high political turnover due to population changes are apt to choose tolerant legal standards. Societies with low turnover are more apt to choose more intolerant and unstable ones. Each group seeks to prevent auditing capabilities of government from improving too much over time in order to prevent future majorities from successfully enforcing more intolerant standards. 相似文献