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71.
The main tools and concepts of financial and actuarial theory are designed to handle standard, or even small risks. The aim of this paper is to reconsider some selected financial problems, in a setup including infrequent extreme risks. We first consider investors maximizing the expected utility function of their future wealth, and we establish the necessary and sufficient conditions on the utility function to ensure the existence of a non degenerate demand for assets with extreme risks. This new class of utility functions, called LIRA, does not contain the classical HARA and CARA utility functions, which are not adequate in this framework. Then we discuss the corresponding asset supply-demand equilibrium model. 相似文献
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74.
Conventional housing price index models assume interperiodparameter stability and typically employ either repeat sales or hedonic methodologies. This paper introduces a method of index construction that combines multiple sales observations with single sale transactions while permitting characteristics prices from hedonic regressions to vary over time. A test for interperiod parameter stability is provided. Each period's data are arranged by location and repeat sales are matched by rows. This construction allows greater use of sample information and acknowledges the unique contribution of repeat sales to the estimation process. It also produces intertemporal error correlations that can be beneficially exploited by the seemingly unrelated regressions (SUH) technique. The paper also demonstrates a significance test for error correlation and discusses the treatment of unequal numbers of observations among index periods. 相似文献
75.
Steven C. Hackett 《International Journal of the Economics of Business》1995,2(1):103-121
This paper offers an empirical analysis of the relationship between income sharing rules and physician heterogeneity in medical group practices.The economies to group formation associated with risk–sharing, mutual monitoring,and internal referral are served by sharing at least a portion of group income equally. Sharing group income equally is problematic, however, when group members differ in their contribution to group income. Member contributions to group income may differ because of differences in ability, effort, or the price of services across specialty fields. The analysis below is addressed to the question of how income sharing rules in physician groups are affected by variation in member contributions. The analysis finds evidence that heterogeneity in member contributions to group income limits the use of equal income sharing rules in multispecialty groups relative to single specialty groups, and large groups relative to small groups. Nevertheless, 65% of all groups in the survey share at least a pn of group income equally, which broadly suggests that the joint surplus enhancement from risk sharing, mutual monitoring, and internal referral are sufficient to overcome the incentive problems of such rules 相似文献
76.
Professor Rolf Färe Dr. James Logan Professor C. A. K. Lovell 《Journal of Economics》1989,50(2):171-180
We are grateful to a perceptive referee for many constructive comments on an earlier version of this paper entitled The Economics of Content Protection: A Dual Approach. The usual disclaimer applies. 相似文献
77.
"We argue that the postwar baby boom [in the United States] caused substantial fluctuations in both the economic rewards to education and educational attainment over the last 3 decades. If substitutability between young and old workers diminishes with education, the present value of lifetime earnings for a boom cohort is depressed more for highly educated workers, reducing incentives for educational attainment. The opposite is true for pre- and postboom cohorts. The diminishing substitutability hypothesis explains the declines in both the returns to college and college completion rates in the 1970s and predicts a substantial increase in educational attainment for postboomers." 相似文献
78.
Simkins CE 《Development Southern Africa》1988,5(4):406-419
"This study surveys the policy issues associated with urbanization following the abolition of the pass laws [in South Africa]. The demographic background is briefly sketched. Using neo-classical analysis as a starting point, particular attention is paid to the present inefficiencies of city form associated with segregation. It is argued that current planning procedures are in danger of perpetuating or even worsening the situation. Obstacles to employment generation are considered and transport, local government and housing issues are discussed. On every front, urbanization policy is unstable and, even in the short term, there will be pressures to change it." 相似文献
79.
Handy C 《Harvard business review》1992,70(6):59-72
In an effort to govern their increasingly complex organizations, chief executives in some of today's largest corporations are turning to one of the world's oldest political philosophies-federalism. Given that organizations are seen more and more as minisocieties, the prospect of applying political principles to management makes a great deal of sense. Federalism is particularly appropriate because it offers a well-recognized system for dealing with paradoxes of power and control: the need to make things big by keeping them small; to encourage autonomy but within bounds; and to combine variety and shared purpose, individuality and partnership, local and global. As London Business School professor Charles Handy explains it, federalism responds to these paradoxes by balancing power among those in the center of the organization, those in the centers of expertise, and those in the center of the action--the operating businesses. The centers of federal organizations meet regularly, but they do not need to live together. Doing so would concentrate too much power in one place, whereas federalism gets its strength and energy from spreading responsibility across many decision points. Guided by five principles, federalism avoids the risks of autocracy and the overcontrol of a central bureaucracy. It ensures a measure of democracy and creates a "dispersed center" that is more a network than a place. That's why Asea Brown Boveri CEO Percy Barnevik calls his sprawling "multi-domestic" enterprise of 1,100 separate companies and 210,000 employees a federation. It succeeds because the independent bits, be they individuals, clusters, or business units, know they are part of the greater whole. 相似文献
80.
Prakasam CP Murthy PK 《Journal of Institute of Economic Research. J.S.S. Institute of Economic Research》1992,27(1):1-11
The authors study the acceptance of family planning methods according to the level of couple's literacy in 14 states in India during 1986-87, using the Lorenz curve. The Gini Concentration Ratio and Index of Dissimilarity were calculated by level of couple's literacy for vasectomy, tubectomy, IUD, and all method combined. Firstly, analysis found literates to have accepted vasectomy and IUD more than tubectomy. Secondly, among the 3 methods, a high Gini Concentration Ratio was found for vasectomy when the wife was literate. Moreover, when the wife was literate, the Gini Concentration Ratio of IUD acceptance was higher than the acceptance of IUD by the wife whose husband was literate. Thirdly, the same trend was observed when the husband was illiterate. It is therefore clear that the level of a woman's literacy is a key factor in securing the acceptance of male or female methods of family planning. Planners should therefore concentrate on literacy programs for females independently of their age. Increasing the level of female literacy may ultimately help improve the understanding of family planning methods, while these women may also motivate their husbands to undergo vasectomy which will ultimately foster the success of the family planning program. 相似文献