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Summary. We construct an OLG model with network effects to examine skill obsolescence when individuals can choose technological vintages. In the absence of transfer payments, some regions of the parameter space have unique stationary equilibria, others have unique cyclical equilibria, and others have multiple stationary equilibria. All equilibria are Pareto efficient. However, rat race equilibria can exist in which all agents currently alive prefer a slower rate of progress than occurs in equilibrium. When contemporaneous transfers are allowed, equilibria are unique everywhere, but a cycle still exists, and a rat race can still arise in equilibrium. Allowing intertemporal transfers (debt) ensures that all equilibria are stationary. In the relevant parameter range, the introduction of debt can eliminate cycles and increase the long-run growth rate. No rat race equilibria exist when debt is allowed.Received: 3 January 2002, Revised: 3 June 2004, JEL Classification Numbers:
041, J24, O33.
Correspondence to: Ian P. KingEarly versions of this paper were presented at the West Coast Macro Workshop, the Mid-West Macro Meetings, the Canadian Macroeconomics Study Group Meetings, and the Society for Economic Dynamics Meetings. We would like to thank V. V. Chari, Merwan Engineer, Don Ferguson, John Hillas, John Knowles, Dan Peled, Dan Usher, Linda Welling and Julian Wright for helpful comments. We are especially grateful to an anonymous referee for some very useful and substantive comments. 相似文献
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King W 《Fund raising management》1999,30(6):35, 42
Successfully asking for a major gift requires practice. We only raise major gifts by asking and that requires us to get out there in front of major gift prospects. We must discipline ourselves to do just that. Being a successful major gift fund raiser requires continual practice. 相似文献
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This paper presents an analysis of Delphi from a Bayesian point of view and brings to attention several hitherto neglected, but highly relevant findings of research in areas other than Delphi proper. The aim has been to seek avenues of improvement in the Delphi technique. This has led to development of a methodology, which is based on a concept of second order probabilities as a measure of one's fuzzy thinking. The justification of this new methodology lies in explicit recognition and implementation of an optimum, determined by the trade-off between advantages and complexities of hierarchial inference. It is essential that conventional Delphi applications, at the very least, be accompanied by a Turoff-type cross impact analysis. It is indicated that the tremendous potential of Bayesianized Delphi in appropriate situations has remained utapped. 相似文献
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The issues of deregulation and privatization are examined as are the operating tactics and strategies of the Australian domestic in their approach to a new era of unregulated competition. The impact of personal management styles is observed and the impacts of equipment choices are noted. In the international context the difficulty of seasonal traffic boosts together with unexpected growth rates in inbound tourism have had major impacts on bi-lateral relations. Qantas has attempted to constrain the growth in both the capacity of existing foreign carriers and the introduction of new carriers. Particular emphasis is given to the U.S.-Australian bi-lateral agreement. 相似文献