A stochastic dominance analysis of the turnover related performance of mutual funds

Mutual fund performance relative to portfolio turnover is examined for funds in different investment categories using non-parametric, stochastic dominance criteria. We find that, in general, high-turnover funds are at least equally preferable to those with low turnover. This suggests that the costs of obtaining and exploiting information are, on average, compensated for by the subsequent return distribution. The exception is maximum capital gains funds. Here, high-turnover funds clearly dominate those with low turnover and the information gathering function is profitable.We gratefully acknowledge the contribution of an anonymous referee and the comments of Art Gudikunst of Bryant College.     

中国外汇储备结构优化的悖论困境

当前中国的外汇结构优化，面临既有紧迫性更具复杂性和挑战性的悖论困境。其成因则是诸多矛盾因素的交织：外汇储备规模庞大但稳定性变数增多，外汇储备增长迅猛但周期性波动频繁，美元持续疲软但美国霸主地位难撼，黄金、能源价格高居不下但“中国因素”短期不易去除。因此，必须谨慎而稳妥地改革外汇储备管理体制．同时稳步推进经济增长模式，由出口和投资主导型向内需主导型的转变。     

专利权保护与滥用市场支配地位

《专利法》保护专利权人的垄断权与反垄断法的禁止滥用市场支配地位制度应保持平衡。鉴于专利垄断的特殊性，对其滥用市场支配地位的管制应相对宽松，反垄断法的规则应当灵活。     

Mean-Gini analysis of stochastic externalities: The case of groundwater contamination

The mean-Gini approach is used to analyze stochastic externalities generated by agricultural production. The model addresses the problem of groundwater pollution caused by excessive fertilizer application. Inherent in the mean-Gini approach to expected utility maximization is a two-fold value: the simplicity of the two-parameter mean-variance model and satisfaction of necessary and sufficient conditions for stochastic dominance. Price and quantity policy recommendations to control externalities are formulated based upon the relative assessment of uncertainty by the regulatory authority and the farmers. Using the Gini as a measure of risk allows for the quantification of control policy measures under differentiated risk aversion and multiple sources of pollution. The model shows that when producers underestimate uncertainty, quota policies restricting fertilizer are more efficient than tax policies in reducing groundwater contamination.Work on this paper was carried out when visiting the University of Maryland. Financial aid for the work was provided by the USDA ERS-NRED under a cooperative agreement between the Department of Agricultural and Resource Economics, University of Maryland, and the USDA — Economic Research Service — Natural Resource Economics Division, I am grateful to John Miranowski and Darrell Hueth for that support. I am indebted as well to Lana Shalit, who helped me revise the paper.     

Stochastic Dominance Analysis of Soil and Water Conservation in Subsistence Crop Production in the Eastern Ethiopian Highlands: The Case of the Hunde-Lafto Area

The aim of this paper is to analyze whether investment in soil and water conservation results in a higher yield and income and/or mitigate variability in yield and income to subsistence farm households in the Hunde-Lafto area. Net returns from crop production with and without soil and water conservation (SWC) are compared based on stochastic dominance (SD) criteria. A non-parametric first order SD and normalized second order are used for data analysis. Analysis is based on the Soil Conservation Research Program (SCRP) database for the Hunde-Lafto research unit. The results of the analysis suggest that adopting a conservation strategy results in higher grain yield and net return than in not adopting. The normalized second order SD analysis results do not support the hypothesis that conservation strategy is unambiguously better than a noconservation strategy in reducing variability in yield and net return to farmers. However, conservation strategy has shown second order dominance at lower levels of yield and income that often correspond to unfavorable rainfall conditions. This makes it a preferred strategy to cope with the most prevalent risk factor of moisture shortage. Therefore, appropriate policies to help and encourage farmers to adopt SWC structures will contribute to improving the welfare of subsistence farm households in the study area and in other similar settings in the country. Designing and implementing SWC techniques that may result in unambiguous second order SD dominance will further improve the desirability and adoption of conservation measures.     

Medical Dominance and Institutional Change in the Delivery of Health Care Services

This paper puts the theory of medical dominance, as it understood as a sociological theory of historical change, into a broader theory of institutional change of the delivery of medical care. The application of medical dominance theory to three institutional contexts (Australia, USA, and Canada) is reviewed. The possibility of progressive institutional change in the delivery of medical care is addressed, as well as the type of technological innovation that might accompany such institutional change. The concept of medical dominance is useful to explain the dominant characteristics supporting the institution of medical practice. However, an explanatory theory of the evolution of health care delivery should be linked to the instrumentally warranted standards for medical care. These standards are then discussed.

Approval voting in scientific and engineering societies

Approval voting is a system in which members can vote for as many candidates as they like in multicandidate elections. In 1987 and 1988, four scientific and engineering societies, collectively comprising some 350,000 members, used this election reform for the first time. Their reasons for adoption varied but centered around efforts to elect consensus candidates. Approval voting has indeed elected so-called Condorcet candidates, who can defeat all other candidates in pairwise contests. Moreover, these winners generally enjoy support among different classes of voters, so they are not merely lowest common denominators, as some analysts had feared. In at least one instance, approval voting would have led to a different winner from plurality voting (in which voters can vote for exactly one candidate); arguably, this winner would have been the better social choice because he had wider support than his closest opponent. On another occasion, approval voting led to ideological voting—in which the voting patterns reflected an underlying ordering of the candidates—but voting in most societies tends to be nonideological. Overall, the recent experimentation with approval voting has shown that it not only may make a difference but also elects broadly acceptable candidates.     

Diversification cones, trade costs and factor market linkages

This paper finds non-uniform differences in the distribution functions of factor usage intensities among 10 rich OECD countries. The 10 countries form three distinct groups such that the between-group differences are more pronounced than within-group differences and capital-abundant countries are in capital-abundant groups. The estimation works even if the same industry codes represent different goods across countries in the data. The finding is consistent with the multiple-cone factor proportions theory with zero trade costs with each group being one cone. An alternative interpretation is non-zero trade costs. Both interpretations imply weak factor market linkages between the countries in different groups.     

The probability of multidimensional poverty: A new approach and an empirical application to EU-SILC data

This paper proposes a novel method to analyze multidimensional poverty by using a large set of feasible weights to summarize the information about the poor, which enables remaining agnostic about the relative importance given to different poverty dimensions. This method allows for the calculation of the individual probability of being poor in a multidimensional perspective. The distribution of individual probabilities can then be combined with Generalized Lorenz dominance techniques to derive unanimous consent for a wide class of social welfare functions with a minimum load of value judgments. The innovations proposed here allow to move from a dual definition of poverty, where poor and non-poor individuals are classified in a mutually exclusive context, to a continuous measure of deprivation capturing both the extensive and intensive margin of multidimensional poverty. The empirical application of the method consists of measuring multidimensional poverty in ten selected countries using four waves of EU-SILC data (2008–2014).