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91.
Computational suite of models with heterogeneous agents II: Multi-country real business cycle models
Wouter J. Den Haan 《Journal of Economic Dynamics and Control》2011,35(2):175-177
This paper describes the second model considered in the computational suite project that compares the performance of different numerical algorithms. It is a multi-country model in which countries face different productivity shocks. Solving such models is a challenging numerical problem unless the number of countries is small. The solutions are functions of a large set of arguments and the functional forms are unknown. Moreover, the solution procedures have to deal with high-dimensional integration problems. 相似文献
92.
Barry ReillyRobert Witt 《Labour economics》2011,18(3):360-370
This paper assesses the evidence for a racial difference in both the dispensation of formal disciplinary sanctions and in the number of fouls called by referees in professional football. The study uses a unique dataset comprising player match-level information drawn from five recent seasons of the English Premiership. These data were merged with data from other sources to identify, among other things, the racial affiliation of the player across four separate categories (viz., white, black, mixed race, and Asian). No systematic evidence of an unfair treatment of players from the non-white minority groups in respect of either the receipt of disciplinary cards or in the number of penalised fouls called by referees was detected. 相似文献
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Gary Koop 《Journal of economic surveys》1994,8(1):1-34
Abstract. Bayesian methods are widely used by theoretical econometricians and statisticians but have not won widespread acceptance from applied researchers. After briefly describing the basic of the Bayesian approach, we discuss several issues relating to the empirical application of Bayesian methods. The existing Bayesian empirical literature is also partially summarized. The remainder of the paper offers a non-technical survey of some recent computational advances in Bayesian econometrics. The overall goal is to persuade economists that Bayesian methods are both computationally feasible and easy to implement in empirical research. 相似文献
96.
E. Bruckner W. Ebeling M. A. Jiménez Montaño A. Scharnhorst 《Journal of Evolutionary Economics》1996,6(1):1-30
Technological innovations have been investigated by means of substitution and diffusion as well as evolution models, each of them dealing with different aspects of the innovation problem. In this paper we follow the well known research traditions on self-organisation models of complex systems. For the first time in the literature we show the existence of a specific niche effect, which may occur in the first stage of establishment of a new technology. Using a stochastic Master equation approach, we obtain analytical expressions for the survival probabilities of a new technology in smaller or larger ensembles. As a main result we demonstrate how a hyperselection situation might be removed in a stochastic picture and thresholds against the prevailing of a new technology in a step-by-step process can be overcome. 相似文献
97.
通过建立证券投资组合损失率概率评价模型,定义损失率概率为单个资产或投资组合的损失率超过市场平均损失率的概率,用于对投资组合的风险进行评价。以某基金为例,计算得到该基金的损失率概率为39.74%,表明该基金有39.74%的概率损失率超过市场平均损失率。以证券投资组合损失率概率最小为目标函数,采用遗传算法进行求解,得出该基金投资组合损失率概率最小时的投资权重系数,最小损失率概率为36.01%,与该基金公司的投资组合相比,损失率概率降低了3.73%,实例证明该模型是降低证券投资组合风险的一种实用方法。 相似文献
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本文运用SWARCH模型分析了我国医疗保健板块收益率的波动,并将医疗保健板块收益率与上证综指、深证成指收益率的SWARCH模型的估计结果进行比较,得出以下结论:医疗保健指数收益率序列呈现出低、中、高三种波动状态,样本区间主要分布于中波动状态,低波动状态的平均持续期最长、中波动状态的平均持续期居中、高波动状态的平均持续期最短,医疗保健指数收益率波动杠杆效应显著;我国股市医疗保健板块收益率波动状态之间的差异高于沪深综指波动状态的差异,医疗保健指数收益率与沪深综指收益率区制转移趋同,但存在着细微差异;医疗保健指数收益率各区制间转移相对频繁,每种波动状态的平均持续期较短,股市医疗保健板块收益率对新信息的反应更为敏感。 相似文献
100.
In the context of three experiments, the authors examine the manner in which consumers compare a sale price to an explicit reference value. They find that a comparison of sale price to regular price may be more likely to involve an absolute (dollar amount) assessment, whereas a comparison of sale price to a competitor's price may be more likely to involve a relative (percent) assessment. The authors also find that vertical (i.e., columnar) placement of prices may result in a greater tendency to estimate discounts in relative terms. Conversely, horizontal (i.e., side-by-side) placement may result in a greater tendency to compute absolute numerical difference. The results provide important implications for retail managers in terms of framing and communicating price discounts. 相似文献