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1.
For Poisson inverse Gaussian regression models, it is very complicated to obtain the influence measures based on the traditional
method, because the associated likelihood function involves intractable expressions, such as the modified Bessel function.
In this paper, the EM algorithm is employed as a basis to derive diagnostic measures for the models by treating them as a mixed Poisson regression
with the weights from the inverse Gaussian distributions. Several diagnostic measures are obtained in both case-deletion model
and local influence analysis, based on the conditional expectation of the complete-data log-likelihood function in the EM algorithm. Two numerical examples are given to illustrate the results. 相似文献
2.
The major contribution of this paper is to make use of generalized runs tests (Cho and White, 2011) to analyze the randomness, i.e. the lack of persistence, in both absolute and relative returns of hedge funds. We find that about 42% of the HFR universe exhibit iid absolute returns over the period spanning 2000 to 2012. These funds are mainly found in proportions within the Macro and Equity Hedge strategies. A similar result holds for relative returns. We also find that funds having non-iid returns often exhibit ARCH effects and structural breaks, with largest breaks located within financial crises. Also, only a small percentage displays persistence in their relative performance, 8.2% to 16.7% of the universe, mainly found in proportions within the Relative Value and Event-Driven strategies. The robustness of results is challenged by implementing the tests on a crisis-free period. We find similar results for absolute returns. For relative ones, differences appear across strategies and benchmarks, but still both ARCH and breaks are present. Our work contributes to the hedge fund literature in terms of methodology, portfolio allocation, and performance measurement. 相似文献
3.
Summary. Suppose that an economic agent is
100% certain that uncertainty she faces is characterized by a particular probability measure, but that she has a fear that, with
100% chance, her conviction is completely wrong and she is left perfectly ignorant about the true measure in the present as well as in the future. This situation is often called
-contamination of confidence. The purpose of this paper is to provide a simple set of behavioral axioms under which the decision-makers preference is represented by the Choquet expected utility with the
-contamination of confidence.Received: 25 November 2002, Revised: 15 November 2004, JEL Classification Numbers:
D81.
Correspondence to: Hiroyuki OzakiWe are grateful to an anonymous referee. The referees comments greatly improved the exposition of the paper. The work reported here is partially supported by a grant from the Economic and Social Research Insitute, the Cabinet Office, the Government of Japan. 相似文献
4.
基于企业家行为动机的中小企业群落式衍生 总被引:1,自引:0,他引:1
本文以嵊州领带产业集群中小企业群落式衍生为案例,分析了中小企业经营骨干辞职创办新企业的行为动机,综合考虑经济、风险态度、个人的主观偏好和其他社会性效用等不同的偏好对选择成为企业家的影响.提出企业家动机各因素对企业家活动的影响关系。 相似文献
5.
金融发展经常被认为是经济增长的一个重要推动因素.同样的,金融发展也可能会影响能源需求.金融发展可以通过促进金融系统发展、带动经济增长并促进产业结构调整这样的传导途径,使能源消费结构发生变动.本文对全球55 个国家23 年(1985~2007)的面板数据库的研究发现,金融发展的确会影响能源消费与需求,进而影响能源消费结构的变动.实证结果表明,金融发展会促进"化石燃料"能源和替代能源消费的增加,减少可再生能源的消费,对能源消费结构的改善有着一定的促进作用.所以,在制定能源相关政策和对高能耗部门进行产业调整时,要考虑金融发展的影响. 相似文献
6.
本文引入风险度量的经济学理性概念:一种风险度量方法为经济学理性的是指,这种方法对风险的度量结果与经济学中理性人对风险的排序结果相一致,采用这种方法度量风险的决策者,其决策结果也是经济学理性的。本文从风险状态下的决策理论出发,论证了在银行监管问题上,经济学理性的风险度量方法需要满足的条件。结合银行资本充足率监管的演进趋势,比较了几种重要的风险度量方法,并提出了一种经济学理性的、符合银行监管需要的风险度量方法。 相似文献
7.
We propose the notions of mixed and behavioral Ellsberg strategies for extensive form games and prove that these strategies are outcome-equivalent if and only if mixed Ellsberg strategies satisfy a certain rectangularity condition. In addition, we show that not only the profile of Ellsberg strategies must be appropriately chosen but also the extensive form must satisfy further restrictions beyond those implied by perfect recall in order to ensure that each player will respect his ex ante strategy choice with the evolution of play. 相似文献
8.
Kazeem B. Ajide Oluwatosin Adeniyi Ibrahim D. Raheem 《The South African journal of economics. Suid-afrikaanse tydskrif vir ekonomie》2017,85(4):553-569
Generating massive investment for growth and development has been one of the main policy goals of most economies around the globe. Countries, most especially developing ones, are highly susceptible to investment volatility owing largely to the fragile nature of their economies as well as weaknesses in terms of dysfunctional institutions. Therefore, sound economic management suggests the need to better understand possible sources for mitigating the adverse effects of investment volatility. Remittances have been identified as important capital flows which do a good job of dousing macroeconomic volatilities. It is on this basis that the study sought to uncover the causal relationship between remittances and investment volatility via the intermediating role of institutions. Using a panel of 70 countries and the system Generalized Method of Moments (GMM) estimator, three insightful outcomes come to the fore. First, remittances played countercyclical roles across the estimated regressions. Second, institutional quality had no significant role in mitigating investment volatility and lastly, the interactive terms of both remittances and institutions significantly mitigated the negative impacts of investment volatility with the exception of the political component of the institutional architecture. Policy suggestions are drawn based on our results. 相似文献
9.
Ivan Moscati 《European Journal of the History of Economic Thought》2017,24(6):1318-1354
AbstractThe paper reconstructs the history of the experimental attempts to measure the cardinal utility of money between 1950 and 1985 within the framework provided by expected utility theory (EUT). It is shown that this history displays a definite trajectory: from the confidence in EUT and the EUT-based measurement of utility of the 1950s to the scepticism that, from the mid-1970s, haunted the validity of EUT as well as the significance of the utility measures obtained through it. By exploring the diverse aspects and causes of this trajectory, the paper covers new ground in the history of both decision theory and utility measurement. 相似文献
10.
We present two theorems that provide necessary and sufficient conditions for an expected utility maximizer to become more risk averse in the sense of Ross with respect to bearing a foreground risk after the introduction of any independent fair or unfair additive background risk. We call these decision makers Ross risk vulnerable, and show that Ross decreasing absolute risk aversion and Ross decreasing absolute prudence are jointly sufficient for Ross risk vulnerability. Restrictions on utility necessary and sufficient for Ross risk vulnerability with respect to stochastic dominance deteriorations of an existing background risk are also presented. Our analysis concludes with applications of Ross risk vulnerability. 相似文献