Poland on the dole: The effect of reducing the unemployment benefit entitlement period during transition

We analyse the unemployment benefit regime change that occurred in Poland in December 1991 using data from the Polish Labour Force Survey. Before December 1991, the entitlement period to unemployment benefits was unlimited. Thereafter, it was reduced to 12 months (with a few exceptions). Using the difference-in-differences approach within a hazard rate framework, we find that the regime change did not have a significant effect on the duration of unemployment. The results thus give credence to the view that the unlimited entitlement period of the old unemployment benefit regime was not the main culprit for the long durations of unemployment in Poland, although the generous eligibility criteria may have contributed to the increase in the incidence of registered unemployment at the beginning of the transition process. Received: 21 May 1997/Accepted: 15 March 1999     

Implementation of a Collaborative Care Initiative for PTSD and Depression in the Army Primary Care System

Collaborative care models hold promise as a means to improve the Military Health System (MHS) to better meet the mental health needs of U.S. military personnel. This article describes an Army-wide collaborative care initiative, RESPECT-Mil (“Re-engineering Systems of Primary Care Treatment for Depression and PTSD in the Military”), aimed at improving care for soldiers with depression and post traumatic stress disorder. Essential to the implementation of RESPECT-Mil has been the use of a centralized coordinating team to facilitate collaborative care practice and policy activities across the multiple levels of the MHS. The article explores the relevance of collaborative care frameworks to the social work profession and concludes with a discussion of future directions for the social work field to promote greater involvement in the integrated care movement.     

Racial inequality and the recognition of racial discrimination in Jamaica

A growing body of literature posits that a population’s denial of the salience of racial discrimination acts as a mechanism of its perpetuation. Moreover, scholars locate a population’s propensity to deny racial discrimination in contemporary ideologies of racial mixing or ethnic fusion. Most quantitative studies of public opinion on these issues are limited to Latin America and the Spanish-speaking Caribbean. This study examines the case of Jamaica. We first (1) examine the extent of Jamaica’s contemporary racial inequality using national census data. We then (2) use nationally representative data from the AmericasBarometer social survey to determine the extent to which a recognition of racial discrimination characterizes Jamaican public opinion. Finally, we (3) explore the salience of an ideology of racial mixing in Jamaica and (4) test whether that ideology affects the likelihood that Jamaicans acknowledge contemporary racial discrimination. Our findings document dramatic social inequality by skin colour in Jamaica and suggest that a majority embrace an ideology that racial mixing is negatively associated with Jamaicans’ recognition of racial discrimination. We discuss our findings and their implications for understanding ideologies of racial mixing and racial inequality in the Americas.     

The Management of Information and Managers in Subsidiaries of Multinational Corporations

A key challenge facing multinational corporations (MNCs) is how to encourage the development of firm specific advantages throughout the network of subsidiaries while maintaining global coherence. As a result, a critical task for top managers in the MNC is to structure the relationship between headquarters and subsidiaries. Thus, headquarters' control of subsidiary behaviour and performance becomes a central integrating function in the MNC. We examine first the relationship between the nationality of the MNC headquarters and its information management, namely the key performance metrics utilized by the parent to evaluate subsidiary performance. Second, we investigate the relationship between the MNC nationality and its management of managers, specifically, the transfer of parent company nationals and corporate acculturation. These questions are investigated in a study of MNC subsidiaries located in Australia, Ireland and Singapore. Our data provide strong evidence that MNCs of all nationalities place the greatest emphasis on financial metrics compared to other performance metrics. Moreover, there are differences in the degree of emphasis on performance metrics across MNC nationality. We found that Japanese and German MNCs place significantly less emphasis on financial measures than US and UK MNCs. Our hypotheses relating to the management of managers were also supported by the data. In comparison with all other MNC nationalities, Japanese MNCs place greater emphasis on the transfer of Japanese managers to overseas subsidiaries and less emphasis on corporate acculturation. While some researchers have argued that management control has become more isomorphic as a result of globalization, our results show that companies from different nationalities diverge in their practices.     

A COURSE MODEL FOR TEACHING CONCEPTS RELATED TO THE SUCCESSFUL IMPLEMENTATION OF QUANTITATIVE ANALYSES

This paper examines a course model for teaching the concepts of successful implementation of quantitative analyses to both administrative and technical students. The objectives of the course were to examine the principles of effective model building and to examine the problems in communication between administrative and technical individuals. The course model utilizes case study discussions in conjunction with a series of applications projects. The cases illustrated a wide variety of implementation concepts, including concepts related to problem definition, analysis planning, information needs, systems modeling, and general model building philosophies. The applications projects gave the students varied experiences in realistic problem solving. A subjective evaluation of the student's progress in the course did show an increased perceptiveness of what constitutes good model building. The quantitative students in the course seemed to improve in their ability to develop practical solutions to problem solving, while the administrative students improved their ability to communicate with technical individuals and to perform evaluations of technical proposals for quantitative analyses.     

Modeling U‐Shaped Exposure‐Response Relationships for Agents that Demonstrate Toxicity Due to Both Excess and Deficiency

Essential elements such as copper and manganese may demonstrate U‐shaped exposure‐response relationships due to toxic responses occurring as a result of both excess and deficiency. Previous work on a copper toxicity database employed CatReg, a software program for categorical regression developed by the U.S. Environmental Protection Agency, to model copper excess and deficiency exposure‐response relationships separately. This analysis involved the use of a severity scoring system to place diverse toxic responses on a common severity scale, thereby allowing their inclusion in the same CatReg model. In this article, we present methods for simultaneously fitting excess and deficiency data in the form of a single U‐shaped exposure‐response curve, the minimum of which occurs at the exposure level that minimizes the probability of an adverse outcome due to either excess or deficiency (or both). We also present a closed‐form expression for the point at which the exposure‐response curves for excess and deficiency cross, corresponding to the exposure level at which the risk of an adverse outcome due to excess is equal to that for deficiency. The application of these methods is illustrated using the same copper toxicity database noted above. The use of these methods permits the analysis of all available exposure‐response data from multiple studies expressing multiple endpoints due to both excess and deficiency. The exposure level corresponding to the minimum of this U‐shaped curve, and the confidence limits around this exposure level, may be useful in establishing an acceptable range of exposures that minimize the overall risk associated with the agent of interest.     

Sexual vs. Nonsexual Currently Most Upsetting Trauma: A Fresh Look at Attenuation of Sexual Response,Alcohol Intoxication,and Post-Traumatic Stress

This study examined the dependence of sexual response (vaginal pulse amplitude [VPA] and subjective sexual arousal) on alcohol intoxication (.10% breath alcohol concentration [BrAC] versus no alcohol) and the nature of a woman’s currently most upsetting traumatic event (C-MUTE), whether it was sexual (e.g., rape) or nonsexual (e.g., combat). Self-reported sexual outcomes were also compared by C-MUTE type. A total of 117 women completed background measures and either drank alcoholic or nonalcoholic beverages. They were shown erotic films and their VPA was assessed. A two (sexual versus nonsexual C-MUTE) by two (.10% BrAC versus no alcohol) analysis of variance (ANOVA) showed that, controlling for post-traumatic stress (PTS) symptoms, women with a sexual C-MUTE showed lower percent VPA change than women with a nonsexual C-MUTE. No significant effects were found for subjective sexual arousal. A multivariate analysis of variance (MANOVA) showed that women with a sexual C-MUTE reported more frequent anxiety and inhibition during partnered sex and more frequent lack of vaginal lubrication versus women with a nonsexual C-MUTE. There was no significant interaction between C-MUTE and alcohol intoxication. Whether a woman is currently upset by past sexual victimization may influence current sexual difficulties. Attenuated VPA may be attributable to the sexual nature of a C-MUTE as opposed to general trauma exposure.     

Improving interim decisions in randomized trials by exploiting information on short‐term endpoints and prognostic baseline covariates

Conditional power calculations are frequently used to guide the decision whether or not to stop a trial for futility or to modify planned sample size. These ignore the information in short‐term endpoints and baseline covariates, and thereby do not make fully efficient use of the information in the data. We therefore propose an interim decision procedure based on the conditional power approach which exploits the information contained in baseline covariates and short‐term endpoints. We will realize this by considering the estimation of the treatment effect at the interim analysis as a missing data problem. This problem is addressed by employing specific prediction models for the long‐term endpoint which enable the incorporation of baseline covariates and multiple short‐term endpoints. We show that the proposed procedure leads to an efficiency gain and a reduced sample size, without compromising the Type I error rate of the procedure, even when the adopted prediction models are misspecified. In particular, implementing our proposal in the conditional power approach enables earlier decisions relative to standard approaches, whilst controlling the probability of an incorrect decision. This time gain results in a lower expected number of recruited patients in case of stopping for futility, such that fewer patients receive the futile regimen. We explain how these methods can be used in adaptive designs with unblinded sample size re‐assessment based on the inverse normal P‐value combination method to control Type I error. We support the proposal by Monte Carlo simulations based on data from a real clinical trial.