Cost‐Benefit Analysis of Passive Fire Protections in Road LPG Transportation

The cost‐benefit evaluation of passive fire protection adoption in the road transport of liquefied petroleum gas (LPG) was investigated. In a previous study, mathematical simulations of real scale fire scenarios proved the effectiveness of passive fire protections in preventing the “fired” boiling liquid expanding vapor explosion (BLEVE), thus providing a significant risk reduction. In the present study the economical aspects of the adoption of fire protections are analyzed and an approach to cost‐benefit analysis (CBA) is proposed. The CBA model is based on the comparison of the risk reduction due to fire protections (expressed in monetary terms by the value of a statistical life) and the cost of the application of fire protections to a fleet of tankers. Different types of fire protections were considered, as well as the possibility to apply protections to the entire fleet or only to a part of it. The application of the proposed model to a real‐life case study is presented and discussed. Results demonstrate that the adoption of passive fire protections on road tankers, though not compulsory in Europe, can be economically feasible, thus representing a concrete measure to achieve control of the “major hazard accidents” cited by the European legislation.     

Measure of internalized sexual stigma for lesbians and gay men: a new scale

The goal of this study is to propose a new Measure of Internalized Sexual Stigma for Lesbians and Gay Men (MISS-LG) that assesses three dimensions of internalized homonegativity: identity, social discomfort, and sexuality. A convenience sample of 735 Italian lesbians and gay male participants was used to demonstrate the psychometric validity of the scale. Results of confirmatory factor analysis supported three identifiable factors reflecting theoretically based constructs of the MISS-LG. The correlations with other instruments demonstrate the convergent validity: lesbian and gay participants with high internalized sexual stigma describe lower levels of self-disclosure and wellbeing. Implications for research and practice are discussed.     

MODEL‐BASED DIRECT ESTIMATION OF SMALL‐AREA DISTRIBUTIONS

Much of the small‐area estimation literature focuses on population totals and means. However, users of survey data are often interested in the finite‐population distribution of a survey variable and in the measures (e.g. medians, quartiles, percentiles) that characterize the shape of this distribution at the small‐area level. In this paper we propose a model‐based direct estimator (MBDE, Chandra and Chambers) of the small‐area distribution function. The MBDE is defined as a weighted sum of sample data from the area of interest, with weights derived from the calibrated spline‐based estimate of the finite‐population distribution function introduced by Harms and Duchesne, under an appropriately specified regression model with random area effects. We also discuss the mean squared error estimation of the MBDE. Monte Carlo simulations based on both simulated and real data sets show that the proposed MBDE and its associated mean squared error estimator perform well when compared with alternative estimators of the area‐specific finite‐population distribution function.     

Risk Sharing in Private Information Models With Asset Accumulation: Explaining the Excess Smoothness of Consumption

We study testable implications for the dynamics of consumption and income of models in which first‐best allocations are not achieved because of a moral hazard problem with hidden saving. We show that in this environment, agents typically achieve more insurance than that obtained under self‐insurance with a single asset. Consumption allocations exhibit “excess smoothness,” as found and defined by Campbell and Deaton (1989). We argue that excess smoothness, in this context, is equivalent to a violation of the intertemporal budget constraint considered in a Bewley economy (with a single asset). We also show parameterizations of our model in which we can obtain a closed‐form solution for the efficient insurance contract and where the excess smoothness parameter has a structural interpretation in terms of the severity of the moral hazard problem. We present tests of excess smoothness, applied to U.K. microdata and constructed using techniques proposed by Hansen, Roberds, and Sargent (1991) to test the intertemporal budget constraint. Our theoretical model leads us to interpret them as tests of the market structure faced by economic agents. We also construct a test based on the dynamics of the cross‐sectional variances of consumption and income that is, in a precise sense, complementary to that based on Hansen, Roberds, and Sargent (1991) and that allows us to estimate the same structural parameter. The results we report are consistent with the implications of the model and are internally coherent.     

Kundenintegration 2.0 – Welche Faktoren beeinflussen die Kundenintegration in transaktionsbasierten Online Communities?

The long-term existence of online communities of transaction mainly depends on the participation of their members. Despite this importance, up to now no studies have empirically investigated the drivers of customer participation in those online communities which are growing in number. The present paper contributes to this research gap by developing a comprehensive model analyzing member-specific, social and provider-specific determinants of customer participation in online communities of transaction. This model is based on two so far rather isolated research streams: traditional customer participation research and online community research. By testing our theoretical model using data generated in an online community of transaction, we identify member-specific drivers to be most important. Thus, providers of these online communities should put an emphasis on marketing activities that have an impact on the community members’ enjoyment and expertise. Moreover, the perceived interactional justice of the interaction within the community and the anticipated saving of money stimulate customer participation as well. Quite unexpectedly, we find social identification and positive network effects to have a negative influence on customer participation.     

Gendering the Politics of Migration 1

Although every aspect of the migration process is shaped by political factors and migration presents many political challenges on the domestic and international levels, the attention of political scientists in the United States and Europe has been limited to relatively few topics, including control over entry and exit, and issues of incorporation and citizenship. Work that considers the political aspects of migration from a gender perspective constitutes an even smaller body of work. In considering the contribution that political science might make to our understanding of gendered migration, this essay points both to some pioneering studies of gendered patterns of migration and incorporation, and also to the growing concern with gender among international organizations and policy makers. Interestingly, the essay shows that it is scholars in neighboring disciplines who have more often have taken up questions of governance and the development of gender‐fair policy towards migrants. The essay raises questions about the relationship between disciplinary boundaries and topical areas and also about the ways in which regional contexts shape the nature of scholarly inquiry by contrasting work on Asia with that in Europe and the United States.