The Prevention of Homelessness Revisited

Conceptual and methodological problems plague efforts to prevent homelessness. Attempts to identify individuals at risk are inefficient, targeting many people who will not become homeless for each person who will. Such interventions may do useful things for needy people, but evidence that they prevent homelessness is scant. Subsidized housing, with or without supportive services, has ended homelessness for families and played a key role in ending it for people with serious mental illnesses. Other risk factors may be less important once housing is secured. But programs that allocate scarce housing may simply reallocate homelessness, determining who goes to the head of the line for housing, not shortening the line itself. We recommend reorienting homelessness prevention from work with identified at-risk persons to efforts to increase the supply of affordable housing and sustainable sources of livelihood nationwide or in targeted communities.     

Helping people to sort it out: The role of social support in the Job Strain Model

This paper reports three studies of occupational stress investigating the role of social support as an intervening variable in the Job Strain Model (Karasek, 1979). A computer simulated mail-sorting work environment was used to assess the effect of demands, control and social support on measures of strain, satisfaction, and perceived and actual task performance. The first experiment ( N =60) tests the basic Job Strain Model by manipulating levels of task demand and control. The second experiment ( N =120) compares high and low levels of two types of social support (informational support and emotional support) to determine whether and how they interact with extreme conditions of the Job Strain Model (high strain and low strain). The final experiment ( N =90) investigates positive and negative forms of social support (praise and criticism) in relation to extreme job strain conditions. Results show that the job strain model is consistent with the stress and performance data, although stress showed no Demand ×Control interaction. Social supports increased arousal, satisfaction and perceived performance, but did not affect stress or task performance. Moreover, contrary to buffer theories, social supports did not interact with the job strain variables. Congruence between preferred and experienced emotional support levels also predicted performance.     

A MCMC algorithm to fit a general exchangeable model

Consider the exchangeable Bayesian hierarchical model where observations y_i are independently distributed from sampling densities with unknown means, the means µi, are a random sample from a distribution g, and the parameters of g are assigned a known distribution h. A simple algorithm is presented for summarizing the posterior distribution based on Gibbs sampling and the Metropolis algorithm. The software program Matlab is used to implement the algorithm and provide a graphical output analysis. An binomial example is used to illustrate the flexibility of modeling possible using this algorithm. Methods of model checking and extensions to hierarchical regression modeling are discussed.     

Asymptotic Distribution for Symmetric Spacing Statistics

A new procedure for testing the H ₀: μ₁ = ··· = μ _k against the alternative H _u :μ₁ ≥ ··· ≥μ _r  ≤ ··· ≤ μ _k with at least one strict inequality, where μ _i is the location parameter of the ith two-parameter exponential distribution, i = 1,…, k, is proposed. Exact critical constants are computed using a recursive integration algorithm. Tables containing these critical constants are provided to facilitate the implementation of the proposed test procedure. Simultaneous confidence intervals for certain contrasts of the location parameters are derived by inverting the proposed test statistic. In comparison to existing tests, it is shown, by a simulation study, that the new test statistic is more powerful in detecting U-shaped alternatives when the samples are derived from exponential distributions. As an extension, the use of the critical constants for comparing Pareto distribution parameters is discussed.     

Breakdown points for redescending m-estimates of location

Breakdown point is one measure of the robustness of an estimate. This paper discusses some unusual properties of the breakdown points of M-estimates of location.     

Adults who grew up in care: constructing the self and accessing care files

Past research on care leavers has, understandably, tended to focus on those who are in their mid‐ to late‐teens or early 20s. This reflects the profound impact of central and local government policy on those young people. It also reflects their prominence in contemporary analyses of most of the indicators of social exclusion among young people in the UK – unemployment, homelessness and lack of educational qualifications among them. However, some issues affecting adults who grew up in care apply across the life course. One such issue is the access that former care adults have to their child care files. Indeed, as we shall see, this issue has particular importance for many older adults (in their 30s and upwards). Policy and practice in this field has changed significantly during the past 20 years and there is a growing awareness of the needs of former care adults in this area. Access to such files can be a significant element in the process of seeking to address identity concerns centring around family and childhood experiences. This paper explores some of these identity concerns and analyses how access to care files both reflects such concerns and attempts to address them.     

Some new international comparisons of productivity performance at the sectoral level

Summary. We present several new measures of gross-output-based total factor productivity (TFP) at the sectoral level for manufacturing industries in the G-7 economies. We calculate measures of both TFP growth and comparative levels. These are obtained by combining conventional Organisation for Economic Co-operation and Development sectoral data on labour and capital inputs with data on intermediate inputs from national input–output tables. Additionally, we derive cyclically corrected measures of TFP growth. Our evidence shows that the considerable gap in TFP between the USA and other G-7 economies is closing but remains significant.     

Adolescent male prostitution by choice

The literature on adolescent male prostitution is scant. The few existing papers tend to focus on the status of adolescent runaways coerced into prostitution within large cities. This article describes prostitution in a midsized midwestern city without many of the anticipated preconditions. Such practice may be more common than is normally assumed.