The Inefficiencies of Regionalised Milk Quota Trade

This paper estimates the inefficiencies associated with the regionalisation of the milk quota trade. An optimisation model is developed to estimate the economic value of quota. Quota values are aggregated to derive quota sale and purchase curves under two scenarios: first, where quotas can be traded nationally and second, where the trade of quota is regionally restricted. Quota trade is simulated and the consequent effects on supplier structure estimated. Through the derivation of sectoral cumulative cost curves it is possible to estimate the impact of regionalising quota trade on sector efficiency. The model is solved using National Farm Survey data from Ireland and the inefficiencies of regionalised quota trade in Ireland are estimated at €27 million. The paper concludes by discussing the implications of restricted quota trade, especially in the context of eventual quota removal.     

Aggregated analysis of in-depth accident causation data

Data collected from in-depth road accident investigations are very informative and may contain more than 500 accident-related variables for a single investigated case. These data may be used to get a more detailed knowledge on accident and injury causation associated with a specific accident scenario. However, due to their complexity, studies using in-depth data at aggregated levels are not common. The objective of this paper is to propose a methodology to analyse aggregated accident causation charts in order to highlight strong and weak relationships between crash causes and pre-crash scenarios. These relationships can be taken into account when developing or assessing new road safety measures (e.g. in-vehicle systems). The methodology has been applied to an in-depth accident dataset derived from the European project SafetyNet. Four different pre-crash scenarios associated with the accident scenario ‘vehicles encountering something while remaining in their lane’ have been investigated. Even if generalization of these results should be done with care because of database representativeness issues, the methodology is promising, highlighting, for example, a well-defined causation pattern related to vehicles striking a vehicle in rear-end accidents.     

Evolutionary stability of prospect theory preferences

We demonstrate that in simple 2×2 games (cumulative) prospect theory preferences can be (semi-)evolutionarily stable, in particular, a population of players with prospect theory preferences is stable against more rational players, i.e. players with a smaller degree of probability weighting. We also show that in a typical game with infinitely many strategies, the “war of attrition”, probability weighting is (semi-)evolutionarily stable. Finally, we generalize to other notions of stability. Our results may help to explain why probability weighting is generally observed in humans, although it is not optimal in usual decision problems.     

Sample size and the Binomial CUSUM Control Chart: the case of 100% inspection

The Binomial CUSUM is used to monitor the fraction defective (p) of a repetitive process, particularly for detecting small to moderate shifts. The number of defectives from each sample is used to update the monitoring CUSUM. When 100% inspection is in progress, the question arises as to how many sequential observations should be grouped together in forming successive samples. The tabular form of the CUSUM has three parameters: the sample size n, the reference value k, and the decision interval h, and these parameters are usually chosen using statistical or economic-statistical criteria, which are based on Average Run Length (ARL). Unlike earlier studies, this investigation uses steady-state ARL rather than zero-state ARL, and the occurrence of the shift can be anywhere within a sample. The principal finding is that there is a significant gain in the performance of the CUSUM when the sample size (n) is set at one, and this CUSUM might be termed the Bernoulli CUSUM. The advantage of using n=1 is greater for larger shifts and for smaller values of in-control ARL. First version: September 1998/Third revision: September 2000     

Monotone risk aversion

Summary. This paper defines decreasing absolute risk aversion in purely behavioral terms without any assumption of differentiability and shows that a strictly increasing and risk averse utility function with decreasing absolute risk aversion is necessarily differentiable with an absolutely continuous derivative. A risk averse utility function has decreasing absolute risk aversion if and only if it has a decreasing absolute risk aversion density, and if and only if the cumulative absolute risk aversion function is increasing and concave. This leads to a characterization of all such utility functions. Analogues of these results also hold for increasing absolute and for increasing and decreasing relative risk aversion.Received: 31 January 2003, Revised: 15 January 2004, JEL Classification Numbers: D81.The views, thoughts and opinions expressed in this paper are those of the author in his individual capacity and should not in any way be attributed to Morgan Stanley or to Lars Tyge Nielsen as a representative, officer, or employee of Morgan Stanley.     

Integrating cumulative impacts into strategic environmental decision-making: Tourism development in Belek,Turkey

This paper focuses on the cumulative impacts of strategic proposals and projects, and searches how cumulative impact assessment (CIA) can be integrated into strategic decision-making. It reviews the CIA literature to address the shortcomings of impact assessments at both strategic and project levels. Subsequently, it suggests a synthesized approach bringing disturbance ecology and adaptive ecosystem approaches together to identify and predict impacts even in challenging data contexts. To illustrate how the synthesized approach can be utilized in CIA integration, it provides a case study from Turkey. The Belek tourism development plan is investigated by using the soft system methodology. Comparison of the actual and hypothetical situations of the case illustrates the possible and desirable changes to improve strategic decision-making. Accordingly, the paper addresses the key role of decision makers’ mindsets and approaches to utilizing experience-based and science-based knowledges in considering cumulative impacts at the strategic level.     

Competition in the acquisition market and returns to bidders in Australia

This study investigates the impact of takeover market competition on the short-run market performance of Australian acquirers. While the market for corporate control predicts a positive association between takeover market competition and acquirers’ announcement period returns, the winner’s curse hypothesis predicts a negative relationship. Using six alternative proxies to capture acquisitions market competition, I find that takeover market competition has a significant negative influence on acquirers’ announcement period returns. However, this effect is more pronounced among private target acquirers, large acquirers and stock-financed acquisitions. The findings further reveal that large bidders acquiring private targets through stock-financed acquisitions are the most penalised group in the capital market in a competitive acquisitions market. Additionally, evidence is found which suggests that competition-induced bids are associated with significantly higher bid premiums and experience negative post-acquisition performance. The findings remain robust to the implementation of alterations to several methodological concerns, the issue of endogeneity and sample selection variations.     

Diversification in lottery-like features and portfolio pricing discount: Evidence from closed-end funds

Why do portfolios often trade at discounts relative to the sum of their components? I provide a new explanation based on the diversification in lottery-like features. I argue that portfolios trade at discounts when their components exhibit a strong lottery-like feature but a low tendency of producing extreme payoffs together. This discount can be partially mitigated if lottery-like components tend to produce extreme payoffs at the same time. I use the closed-end fund setting to provide empirical supports for this explanation. My findings support prospect theory from an alternative perspective and provide a novel explanation for the closed-end fund puzzle.     

英国个人所得税源泉扣缴制度

我国的个人所得税对工资薪金收入虽然采取了代扣代缴、源泉扣缴的征收方式,但在制度设计上仍有待进一步完善。英国个人所得税源泉扣缴制度按年计算、滚动预缴的征管方法给了我们有益的启示。     

水陆嵌套系统的旅游学价值

从旅游学和景观生态学的角度分析水陆嵌套系统的旅游学特性和效应，探讨了系统作为旅游开发的普遍意义和问题，并提出其旅游学价值的推论。