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Determinants of GNMA Mortgage Prices 总被引:5,自引:0,他引:5
This paper contrasts three different arbitrage-based models for the pricing of GNMA securities, and analyzes the effect of different assumptions about the call policy pursued by the issuers of the underlying mortgages. Both the nature of the interest-rate uncertainty captured by the model and the assumed call policy have a major effect on the yield differentials predicted between GNMA securities and Treasury Bonds. 相似文献
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Margaret Ann Bock Marsha Read Christine Bruhn Garry Auld Kathe Gabel Georgia Lauritzen Y. Lee Judiann McNulty Denis Medeiros Rosemary Newman Susan Nitzke Melchor Ortiz Howard Schutz Edward Sheehan 《International Journal of Consumer Studies》1998,22(1):25-37
Abstract The objective of this research was to ascertain the gender-and ethnic-related factors that influence what one eats. This survey was conducted using a validated, pilot-tested questionnaire in 11 states and the District of Columbia, which were participating in the W-182 Western Regional Research project. The results indicated that the factors that influence what one eats differ by gender and ethnicity. Men were very much influenced by likes and dislikes, and by their spouse or significant other. Women were influenced by likes and dislikes, and health. Food likes/dislikes and concerns about health and weight were among the leading four factors for all ethnic groups. Food likes/dislikes were the top factor influencing what is eaten by 51% or more of Asians, Pacific Islanders, Caucasians and Hispanics. Concern about health was the top factor for 62% and 58%, respectively, of African Americans and Native Americans. 相似文献
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We investigate jump memory using an extensive database of short‐term S&P 500 index options. Jump memory refers to the attenuation of the implied jump intensity and magnitude parameters following a crash event. We use a genetic algorithm to obtain a time series of implied parameter estimates and posit behavioral and rational explanations for parameter attenuation following a crash event. We find that a nested form of the jump‐diffusion model sharpens the remaining parameter estimates and has a negligible effect on pricing accuracy. 相似文献
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Howard Wagstaff 《Journal of Agricultural Economics》1986,37(2):163-172
Traditional macroeconomic approaches to the employment problem are insufficient at the stage of development reached in the industrially advanced capitalist economies, and employment policy has to encompass a much wider range of incentives, public expenditure criteria, and investment decisions affecting all sectors of the economy. Implications for the agricultural sector are discussed. Employment and labour use are seen as inter-related with other aspects of agricultural policy, including those concerned with agronomic and ecological problems. Performance criteria often adopted in evaluating agricultural change are called into question, and a reappraisal of cost concepts is found to raise some fundamental issues faced by industrially advanced societies. 相似文献
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Paul Krugman's essay “Who Was Milton Friedman?” seriously mischaracterizes Friedman's economics and his legacy. In this paper, we provide a rejoinder to Krugman on these issues. In the course of setting the record straight, we provide a self-contained guide to Milton Friedman's impact on modern monetary economics and on today's central banks. We also refute the conclusions that Krugman draws about monetary policy from the experiences of the United States in the 1930s and of Japan in the 1990s. 相似文献