“Generalized Pareto Fit to the Society of Actuaries’ Large Claims Database,” Ana C. Cebrián,Michel Denuit,and Philippe Lambert,July 2003

Abstract

We consider the issue of modeling the latent or hidden exposure occurring through either incomplete data or an unobserved underlying risk factor. We use the celebrated expectationmaximization (EM) algorithm as a convenient tool in detecting latent (unobserved) risks in finite mixture models of claim severity and in problems where data imputation is needed. We provide examples of applicability of the methodology based on real-life auto injury claim data and compare, when possible, the accuracy of our methods with that of standard techniques. Sample data and an EM algorithm program are included to allow readers to experiment with the EM methodology themselves.     

Análisis del desnivel salarial entre hombres y mujeres con un modelo de equilibrio

Según un modelo de equilibrio generalde dos esferas (hogary mercado), la productividad de la mujer en el trabajo remunerado disminuye cuantas más tareas desempeña en el hogar. Partiendo del supuesto de que las aportaciones de hombres y mujeres a las labores domésticas son complementarias, las autoras comprueban que hay múltiples equilibrios posibles. En algunos, ellosy ellas asumen estas tareas por igualy ganan salarios iguales; en otros, se las reparten de manera dispar y ganan salarios diferentes. Por otraparte, los estereotipos acerca de la productividad de las mujeres perpetúan la desigualdad. Las autoras, valiéndose de ejemplos numéricos, demuestran que hay mayor bienestar cuando los cónyuges se reparten el trabajo a partes iguales. Para terminar, exponen algunas conclusiones.     

Consumer Intentions to Buy Front-of-Pack Nutrition Labeled Food Products: The Moderating Effects of Personality Differences

Although the current literature suggests that consumers in general have a desire to eat healthy and also like to obtain nutrition information about food products, there still exists a gap in terms of understanding how consumers utilize nutrition information. Drawing on consumer psychology literature, we examine how self-efficacy, healthy eating intentions, and perceptions about a simple front-of-pack nutrition label affect purchase intentions, and how these effects may be moderated by two information-processing-related personality traits—need for cognition and propensity to self-reference. We find that consumers’ intention to purchase front-of-pack nutrition-labeled products is positively affected by self-efficacy and label perceptions but is not directly driven by a general interest in healthy eating. We also find significant moderating effects from both personality traits considered.     

Response Rate and Response Quality of Internet-Based Surveys: An Experimental Study

This study examines the effect of the timing of follow-ups, different incentives, length, and presentation of the questionnaire on the response rate and response quality in an online experimental setting. The results show that short questionnaires have a higher response rate, although long questionnaires still generate a surprisingly high response. Furthermore, vouchers seem to be the most effective incentive in long questionnaires, while lotteries are more efficient in short surveys. A follow-up study revealed that lotteries with small prizes, but a higher chance of winning are most effective in increasing the response rate. Enhancing questionnaires with visual elements, such as product images, lead to a higher response quality and generate interesting interaction effects with the length of the questionnaire and the incentives used. Finally, the timing of the follow-up has no significant influence on the response rate.     

What We Know About Environmental Policy: An Inductive Typology of the Research

Environmental performance is a multidimensional concept that is difficult to measure since it concerns the pollution generated by companies, their energy consumption and their different environmental policies. Academic research has used objective and/or non‐objective indicators to measure this performance, dealing with both its managerial and measurement dimensions. This paper provides an inductive typology of the academic work concerning environmental policy through a computerized content analysis of 151 articles from 1992 to 2014 related to the management and measurement of environmental performance. The results highlight four major themes around which the academic research is organized: the relationship between environmental and financial performance, environmental performance under stakeholder engagement and institutional pressures, the strategic management of environmental performance, and increasing awareness of the sustainable development issue. Environmental performance research has evolved from a quantitative towards a more managerial dimension, highlighting the integration of performance within the management of a corporate business strategy. Copyright © 2015 John Wiley & Sons, Ltd and ERP Environment     

Who promotes a value‐in‐diversity perspective? A fuzzy set analysis of executives’ individual and organizational characteristics

Diversity perspectives are philosophies of or approaches to diversity held by organizations, groups, or executives. They are important for organizations because they can determine the success or failure of diversity in the workforce. However, little is known about the predictors of diversity perspectives among executives. Using fuzzy set qualitative comparative analysis, we analyzed 50 interviews with top executives in Germany to identify individual and organizational characteristics that predict executives' adoption of a diversity perspective, in particular of a value‐in‐diversity perspective. Specifically, we analyzed gender, age, education level, vocational background, and tenure (individual characteristics), as well as size, sector of organization, and competitive environment (organizational characteristics), as potential predictors. We found single characteristics did not predict adoption, but configurations of characteristics did. Drawing on the person‐situation‐interactionist perspective, we developed specific profiles of executives likely to foster a value‐in‐diversity perspective and identified characteristics of their work environments that support such an approach. Theoretical and practical implications are discussed.     

Impact of farm management diversity on the environmental and economic performance of the wheat–maize cropping system in the North China Plain

To assess the attainable greenhouse gas (GHG) mitigation potential from crop production in China's most important grain production region, the North China Plain (NCP), single farm environmental and economic performances of 65 winter wheat–summer maize (WW–SM) producing households were determined. The results revealed a huge heterogeneity among farms, with up to five times higher environmental impact of worst compared to best performing farms. Astonishingly no trade-off between productivity and sustainability could be identified in the region, with high-yield farms emitting no different amounts of GHGs per hectare compared to low-yield farms. Building on cluster analysis, with farms grouped according to their economic and environmental performance into ‘poor’, ‘fair' and ‘good’ producers, the regional GHG mitigation potential was estimated. Under the scenario assumption that all grain in the NCP is produced under ‘good’ production conditions, 21% and 7% of GHG could be mitigated in wheat and maize production, respectively. The study shows that in the NCP, exemplary for China's rapidly developing agricultural sector, the crop management skills of a substantial share of farmers could obviously not keep pace with the massive input intensification. Among others, farmer–farmer trainings are recommended to close the gap in crop production performance among producers.     

Familial control,size and performance in the largest French firms

This paper explores to what extent large French firms in the hands of wealthy families have performed in a significantly different manner from non-familial firms. The results of the econometric analysis confirms the Monsen Downs Williamson theory according to which only a combination of size and divergent goals could cause deviations from profit-maximization. Indeed, it is established that when ownership and management are not essentially separate, large size has a systematically better impact upon profitability than when such a divorce exists. Differences in financial structure viz leverage do not affect the result.     

Yet another look at Léon Walras's theory of tâtonnement

Starting with a detailed discussion of the theorem of equivalent redistributions, Part 1 examines the central role played by the distributional neutrality of tâtonnement in Walras's pure theory of exchange. Part 2 extends this discussion to Walras's attempts at reaching a similar result when dealing with the successive versions of his theory of production before 1900. Part 3 contrasts Walras's and Edgeworth's respective technologies of exchange in order to demonstrate that a distributionally neutral tâtonnement is an intrinsic part of Walras's theory of exchange. Finally, and besides briefly summarizing the results, the conclusion develops the crucial connection between the necessity of a converging and distributionally neutral tâtonnement in pure economics with Walras's theories of property and justice.