The Jewish Exodus from the New South Africa: Realities and Implications

In the 1990s, the Jewish population of South Africa declined at an unprecedented rate in marked contrast to Jewish populations in other English-speaking countries.
Possible explanations include fear of political instability and political violence, deteriorating economic conditions and prospects, fear of directly discriminatory government policies, rising violent crime rates, and more permissive immigration policies in desirable destination countries.
All but the last of these factors appear to have played some role. However, only changes in violent crime rates provide an explanation for the unprecedented surge in net emigration, persisting even after a successful political and economic transition to majority black rule under moderate African National Congress governments.
Changes in crime rates also provide the most satisfactory explanation for related changes in internal migration patterns.     

Venture philanthropy and social entrepreneurship in community redevelopment

This article provides a case study of Tom Cousins, a social entrepreneur who used his own venture philanthropic investments and leveraged additional resources through extensive public‐private partnerships for the sole intent of redeveloping an area of disinvestment and poverty. In the process, Cousins also provided the visionary, strategic, and operational leadership often associated with the actions and responsibilities of a social entrepreneur. The limited research to date has investigated social entrepreneurship and venture philanthropy as separate and often unrelated concepts. In this study, we analyze the sustained and intensive involvement by Cousins and his foundations and the continued leadership provided in the creation of public‐private partnerships focused on the redevelopment of the East Lake area in Atlanta.     

Small sample properties of the logit maximum likelihood estimator:a simulation study

This paper explores the effect of sample size, scale of parameters and size of the choice set on the maximum likelihood estimator of the parameters of the multinomial logit model. Data were generated by simulations under a three-way factorial experimental design for logit models containing three, four and five explanatory variables. Simulation data were analyzed by analysis of covariance and a regression model of the performance measure, the log root mean-squared error (LRMSE), fitted against the three factors and their interactions. Several important conclusions emerged. First, the LRMSE improves, but at a decreasing rate, with increases in the model's degrees of freedom. Second, the number of choice alternatives in the decision makers' choice sets has a significant impact on the LRMSE; however, heterogeneity in the choice sets across the sample has little or no impact. Finally, the scale of parameters and all of its two-way interactions with the other two factors significantly affect the LRMSE. Using the regression results, a family of iso-LRMSE curves are derived in the space of model degrees of freedom and scale of parameters. Their implications for researchers in choosing sample size and scale of parameters is discussed.     

Career Change for Those Over 40: Critical Issues and Insights

This article discusses the recent phenomenon of older career changers and highlights some of the strengths and proactive strategies for such people. Issues include dealing realistically with negative perceptions and stressing advantages of the mature career changer.     

Estimation of trade-offs with capture-recapture models: A case study on the lesser snow goose

Trade-offs between traits such as fecundity or survival are fundamental to much of our understanding of the evolution of life histories. There has been much renewed interest and controversy concerning methods for estimating trade-offs, in the wild or in captivity, and with or without experimental manipulations. In this paper, we assess the general question of the utility of modern capture-recapture methods as a robust tool for estimating trade-offs in natural populations. We present results from analyses of two forms of trade-offs: the cost of present reproduction on future survival and the cost of present reproduction on the probability of breeding in the future. We apply the methods to data from a long-term study of a snow goose population, and generally discuss the advantages and potential problems with various approaches.     

Postnatal Effects of Prenatal Insult

Exogenous agents may perturb development during the embryonic period and adversely affect the formation of organs. However, adverse effects on development are not limited to the embryonic period nor are the manifestations restricted solely to outright gross structural malformation, but may instead be expressed as a decrement or abberration of postnatal function. Susceptibility to altered development may extend well into the postnatal period. Studies of functional parameters in several organ systems have demonstrated the broad-based susceptibility, subtlety of expression and potential of long-lasting effects of altered development assessed by physiologic assays. Adverse effects on functional development, whether in the CNS, reproductive, gastrointestinal, genitourinary, respiratory, or immune systems, etc., merit continuing investigation. From the viewpoint of risk estimation and hazard detection, evaluations of postnatal functional parameters may be relevant for several reasons. First, such parameters may serve as low-dose triggers. Second, they may be useful as a focal point for epidemiological studies. Finally, a more thorough understanding of the degree and magnitude of such postnatal functional deficits is needed since an adverse maternal effect may be transient, considered acceptable, or unperceived, but the effect on the conceptus may be permanent and severe. The immune and respiratory systems are discussed as two examples of how subtle and protean adverse effects on functional development may be.     

Children's protective services and law enforcement: fostering partnerships in investigations of child abuse

Although collaboration in child abuse investigations has been emphasized since 1974, barriers, including role conflicts and organizational differences, have often been reported. This study describes the process of collaboration based on the perceptions of investigators working with a Child Advocacy Center. Telephone interviews were conducted with 290 child protective service workers and law enforcement officers from 28 child advocacy centers in 20 different states. Respondents identified barriers to the process of collaboration such as conflicts over case control and facilitators including co-housing and cross-training. Conditions that should contribute to successful collaboration are discussed.