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41.
Yehoshua Liebermann Shmuel Stashevsky 《Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l\u0027Administration》2009,26(4):316-331
A conceptual framework intended to predict the number of online purchases made by Internet users in an early stage market is presented and examined using data collected in Israel. Those more likely to report buying online saw low costs and substantial benefits associated with e-shopping. They were experienced Internet users who valued online information searching. They were also more likely to shop over the phone, but did not especially like to go shopping. Finally, they tended to be the primary purchaser in the household. Our framework enhances understanding of the factors affecting consumers' online shopping behaviour, aides in profiling typical electronic shoppers, and may help practitioners develop more personalized marketing programs to increase e-commerce sales. Copyright © 2009 ASAC. Published by John Wiley & Sons, Ltd. 相似文献
42.
Greenhouse gas regulation aimed at limiting the carbon emissions from the electric power industry will affect system operations
and market outcomes. The impact and the efficacy of the regulatory policy depend on interactions of demand elasticity, transmission
network, market structure, and strategic behavior of generators. This paper develops an equilibrium model of an oligopoly
electricity market in conjunction with a cap-and-trade policy to study such interactions. We study their potential impacts
on market and environmental outcomes which are demonstrated through a small network test case and a reduced WECC 225-bus model
with a detailed representation of the California market. The results show that market structure and congestion can have a
significant impact on the market performance and the environmental outcomes of the regulation while the interactions of such
factors can lead to unintended consequences. 相似文献
43.
To tackle challenges from derivatives trading and illiquidity, reduce manipulation and improve price discovery, many exchanges have started opening at random times. We investigate how randomization has affected the performance of the Tel Aviv Stock Exchange at trade opening and at the expiration of stock-index derivatives. Randomization has improved price discovery and reduced excess volatility and price distortion, especially on expiration dates. Although preopening prices do not converge to full information values, post-randomization, opening prices on expiration days are at least as accurate as on other days. Spot market trading systems significantly impact the effects of derivatives on spot prices. 相似文献
44.
The Effect of Trading Halts on the Speed of Price Discovery 总被引:1,自引:0,他引:1
Shmuel Hauser Haim Kedar-Levy Batia Pilo Itzhak Shurki 《Journal of Financial Services Research》2006,29(1):83-99
Trading halts are aimed at reducing information asymmetry by granting investors the opportunity to reassess trades upon arrival
of new, substantial information. This study is the first to address the efficiency of the price discovery process with respect
to time, i.e., the speed of adjustment to new information. A unique database allow us to conduct an event study analysis and
measure the impact of trading halts on price discovery while controlling for content, operational and value effects. We find
that information dissemination following trading halts is over 40% faster and that abnormal trading activity is positively
related to the speed of price adjustment. 相似文献
45.
Shmuel Kandel 《Journal of Financial Economics》1984,13(4):575-592
The question whether a given porfolio is mean-variance efficient is a basic problem of investment analysis. Mean-variance efficiency is also the basis of the Capital Asset Pricing Model. This paper presents the explicit form of the likelihood ratio test of the hypothesis that a given portfolio, or a particular market index, is ex-ante mean-variance efficient in the case where there is no riskless asset. Geometric relations are illustrated to provide intuition about the constrained maximum likelihood estimators and the test statistic, and two simple economic interpretations of the test are given. 相似文献
46.
We model constitutions by effectivity functions. We assume that the constitution is common knowledge among the members of the society. However, the preferences of the citizens are private information. We investigate whether there exist decision schemes (i.e., functions that map profiles of (dichotomous) preferences on the set of outcomes to lotteries on the set of social states), with the following properties: (i) The distribution of power induced by the decision scheme is identical to the effectivity function under consideration; and (ii) the (incomplete information) game associated with the decision scheme has a Bayesian Nash equilibrium in pure strategies. If the effectivity function is monotonic and superadditive, then we find a class of decision schemes with the foregoing properties. 相似文献
47.
Dan Elnathan Ilanit Gavious Shmuel Hauser 《The International Journal of Accounting》2010,45(4):387-412
This study investigates differences in expert valuations of private versus public firms conducted for transactions outside the exchange. First, we provide evidence for extreme reliance of the experts on private firms' reported earnings, despite a possible manipulation of these earnings. In contrast, experts valuing public firms seem to rely on other, non-financial statement information sources, even if the quality of pre-acquisition earnings is higher in these firms. Second, we present evidence that the contribution of experts to investors in private firms is questionable at best. Our findings indicate that a private firm valuation performed by a potential investor based on available information provides results similar to those of the expert. Third, we show that inconclusive results regarding the existence of a discount in private firm valuations may be explained by experts' compliance with the interests of the commissioner of the valuation. This finding provides at least a partial explanation for the private company discount, one that adds to prior standard explanations (e.g., liquidity) offered in the finance literature. 相似文献
48.
This paper extends one aspect of the US stock market study of Fama (1990) and Schwert (1990). We examine the relationship between industrial production (IP) growth rates and lagged real stock returns for the G-7 countries using both in-sample cointegration and error-correction models and the out-of-sample forecast-evaluation procedure of Ashley et al. (1980). The cointegration tests show a long-run equilibrium relationship between the log levels of IP and real stock prices, while the error-correction models indicate a correlation between IP growth and lagged real stock returns for all countries except Italy. The out-of-sample tests show that in several sub-periods the US, UK, Japanese, and Canadian stock markets enhance predictions of future IP. 相似文献
49.
The algorithm presented in this paper describes an interactive approach for generating search directions in multiobjective linear programming problems (MOLP). The approach is based on using the AHP to assign priorities to vertices adjacent to those that are in the basis, as generated by the simplex method. Using these priorities, an approximate gradient is found that is used to weigh the objective functions during the next iteration. The novel feature of the algorithm is that the decision-maker (DM) is not required to provide interactive inputs to implicit preference questions concerning his objectives, but instead considers explicit evaluation of adjacent possible improvements to generate the next step in his most preferred direction. 相似文献
50.
We investigate a proxy for monthly shifts between bond funds and equity funds in the USA: aggregate net exchanges of equity funds. This measure (which is negatively related to changes in VIX) is positively contemporaneously correlated with aggregate stock market excess returns: One standard deviation of net exchanges is related to 1.95% of market excess return. Our main new finding is that 85% (all) of the contemporaneous relation is reversed within four (ten) months. The effect is stronger in smaller stocks and in growth stocks. These findings support the notion of “noise” in aggregate market prices induced by investor sentiment. 相似文献