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排序方式: 共有1038条查询结果,搜索用时 31 毫秒
61.
This paper investigates the distribution of parallel exchange rates in African countries using exploratory data analysis techniques and model fitting. Stable laws are fitted to empirical distributions using the maximum likelihood estimation method. Empirical evidence supports the stable hypothesis these distributions are positively skewed and have tails that are much heavier than Gaussian counterparts. The stable hypothesis is further supported by the “converging variance test,” which suggests that these distributions have infinite variance. 相似文献
62.
General confirmation theory, and especially its Bayesian variant, has never been able to adequately address the issue of how to handle qualitative evidence instances. Such statements encompass a wide class including historical claims, those of the human sciences not incorporating quantitative models, legal statements and the like. The issue was recognized by the philosopher Swinburne (1973) who puzzled how such statements as, Caesar crossed the Rubicon, could be assigned a meaningful probability estimate. The present paper suggests that such statements can be transformed into, at least, plausible probability estimates. This requires a two step process: judgements made by credible raters, and the transformation of judgements into one or more reliability co-efficients. These reliability estimates can then be utilized in the standard Bayesian model to yield plausible degrees of belief between hypothesis and evidence. 相似文献
63.
Robert Miller 《Economic Affairs》1991,11(5):4-5
Britain needs a complete transformation of its policy towards monopoly. Robert Miller argues that freedom of entry is the vital ingredient of policy for regulating monopolies and public utilities. 相似文献
64.
Ronald J. Balvers John Affleck-Graves Robert E. Miller Kevin Scanlon 《Review of Quantitative Finance and Accounting》1993,3(2):221-239
In this paper we generalize Rock's theory regarding the underpricing of IPOs. In Rock's model, informed investors have a firm-specific
informational advantage pertaining to a firm's cash flow. We derive the new results that the level of beta and the size of
the market risk premium positively affect underpricing. These implications extend the adverse selection theory and further
distinguish this theory from the current state of signalling theories of underpricing. The results put the “hot and cold”
issue markets phenomenon in a theoretical context. Empirical results are consistent with the theoretical propositions and
provide support for Rock's theory of underpricing. 相似文献
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Spotting management fads 总被引:4,自引:0,他引:4
Business fads can change companies, for better or worse. They can introduce useful ideas but often fail to deliver on promises. So how can managers tell a fad from a tool that might endure? For one thing, beware of suspiciously simple techniques. If they seem too easy, they probably are. 相似文献
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