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1.
The Ellsberg paradox demonstrates that people's beliefs over uncertain events might not be representable by subjective probability. We show that if a risk averse decision maker, who has a well defined Bayesian prior, perceives an Ellsberg type decision problem as possibly composed of a bundle of several positively correlated problems, she will be uncertainty averse. We generalize this argument and derive sufficient conditions for uncertainty aversion. 相似文献
2.
Pistor Katharina; Keinan Yoram; Kleinheisterkamp Jan; West Mark D. 《World Bank Research Observer》2003,18(1):89-112
The pattern of legal change in countries that have their legalsystems transplanted from abroad differs markedly from countriesthat develop their own systems, irrespective of the legal familyfrom which their laws come. In "transplant" countries, law oftenstagnates for long periods of time; when change takes place,it tends to be radical, if not erratic. External models remaindominant even years after the law was transplanted. Althoughthere is some evidence that transplant countries have engagedin comprehensive legal reforms in response to the pressuresof globalization, it is still too early to judge whether thesenew changes can be taken as a sign that the legal systems inthese countries have started a process of endogenous legal evolution. 相似文献
3.
We re-examine some of the standard axioms used in the literature on poverty measurement. Using a sample of 486 students from Australia, Israel and the USA we investigate the extent to which individuals' perceptions of poverty correspond to the axioms. We find that axioms such as anonymity, growth of the poor and monotonicity are resonably well supported. However there is very little support for the focus axiom and the principle of transfers was the least well supported of the eight specific criteria for poverty measurement that we examined. 相似文献
4.
Neuman, Yoram, Abraham Pizam and Arie Reichel, Values as Determinants of Motivation: Tourism and Other Career Choices. Annals of Tourism Research 1980, VII (3): 428–442. This study examined the predictive validity of work values in explaining motivational patterns of three groups of career preparation differing in their occupational specificity: Tourism/Hospitality, Management, and Liberal Arts. It was found that the higher the occupational specificity of a career preparation the higher is the predictive validity of work values in explaining work motivations. As predicted, the best relationships between values and motivation was found in the maximally specified occupation, namely: tourism/hospitality students, followed by management students with the liberal arts students — the most flexible occupational group — having the lowest relationship between values and motivation. The implications of the findings for employee selection and motivation prediction in the tourism/hospitality industry are discussed. 相似文献
5.
6.
We compare alternative solutions to underinvestment (UI) problems in firms subject to limited access to equity markets, interest ceilings, and constraints on the volume of debt. Collaterals (assets or compensating balances) and credit insurance ('regular' or 'outcome' insurance whereby the premium is paid at the end of the insurance period) are compared on the basis to their costs and their effective use of financial sources. It is shown that when there is no moral hazard problem, credit insurance is the most effective instrument. Otherwise, 'outcome' insurance program is the most effective one. 相似文献
7.
On-Line Portfolio Selection Using Multiplicative Updates 总被引:6,自引:0,他引:6
David P. Helmbold Robert E. Schapire Yoram Singer & Manfred K. Warmuth 《Mathematical Finance》1998,8(4):325-347
We present an on-line investment algorithm that achieves almost the same wealth as the best constant-rebalanced portfolio determined in hindsight from the actual market outcomes. The algorithm employs a multiplicative update rule derived using a framework introduced by Kivinen and Warmuth. Our algorithm is very simple to implement and requires only constant storage and computing time per stock in each trading period. We tested the performance of our algorithm on real stock data from the New York Stock Exchange accumulated during a 22-year period. On these data, our algorithm clearly outperforms the best single stock as well as Cover's universal portfolio selection algorithm. We also present results for the situation in which the investor has access to additional "side information." 相似文献
8.
Jerry Yoram Wind 《Journal of the Academy of Marketing Science》2009,37(1):28-34
Just as Peter Drucker pointed out the importance of assessing whether a company’s “theory of business” is relevant, marketers
need to consider whether the current “theory of marketing” still fits in a world of rapid change. The author examines how
Drucker challenged the theory of business at financial services firm Edward Jones, helping to identify new market opportunities.
For example, he urged the company to move into metropolitan areas, which now account for 60 percent of the firm’s business.
The article then considers how the field of marketing needs to reexamine its own mental models. Finally, the article considers
how Drucker’s seminal insights on marketing, particularly his emphasis on an interdisciplinary approach, might point the way
to new approaches. 相似文献
9.
Does Technological Innovation Really Reduce Marginal Abatement Costs? Some Theory,Algebraic Evidence,and Policy Implications 总被引:1,自引:1,他引:1
The existing literature models innovation in pollution control as a reduction in marginal abatement costs. We show that this
assumption is inappropriate for production process innovations such as fuel switching. Algebraically, we examine the effects
of different innovation types on marginal abatement cost curves, showing that some desirable innovations increase marginal abatement costs. Empirically, we estimate marginal abatement costs for sulfur dioxide by measuring the output distance
function for electric power in Korea. Regression results confirm that production process innovations did raise marginal abatement
costs in this case. One policy implication: economic instruments do not always provide stronger innovation incentives than
command-and-control policies.
相似文献
10.