No overall effect of urbanization on nest-dwelling arthropods of great tits (Parus major).

Urbanization has been shown to strongly affect community composition of various taxa with potentially strong shifts in ecological interactions, including those between hosts and parasites. We investigated the effect of urbanization on the composition of arthropods in nests of great tits in Flanders, Belgium. These nests contain taxonomically and functionally diverse arthropod communities including parasites, predators, detritivores and accidental commensals. Using a standardized hierarchical sampling design with subplots (200 m?×?200 m) nested in plots (3 km?×?3 km) of varying urbanization levels, we collected arthropods from nests of resident great tits after the young had fledged. Arthropods were extracted, identified to Primary Taxonomical Groups (PTG) and counted. Using generalized linear mixed models (GLMMs) we found diverging effects of urbanization on PTG occurrences and abundances at various levels, but we did not find an overall signal in arthropod diversity or richness. Also, visual inspection of non-metric multidimensional scaling (NMDS) plots did not reveal any community differences between urbanization levels at plot or subplot scales. Land use and environmental variables at different distances around nestboxes did not contribute much to the variation between communities. Our results indicate that arthropod nestbox communities are generally not adversely affected by urbanization, and even city gardens and parks harbor comparable communities to forests and suburban areas. We thus found no evidence for a parasite release effect due to urbanization, nor an increased risk of parasitism in human-dominated environments.

     

Six-Month Follow-Up Changes for TANF-Eligible Clients Involved in Kentucky's Targeted Assessment Program

ABSTRACT

Welfare reform has been successful in helping clients achieve self-sufficiency. However, some individuals experience problems associated with basic needs, physical health, mental health, substance abuse, and intimate partner violence (IPV) that can impede transitioning from welfare to work and/or interfere with parental responsibilities. The Targeted Assessment Program (TAP) was created more than a decade ago to identify and address these problems and help clients move off the welfare rolls in Kentucky. Self-reported interview data were used to examine changes and effect sizes between baseline assessment and 6-month follow-up from a sample (n = 322) of Temporary Assistance for Needy Families-eligible clients participating in Kentucky's TAP. Using McNemar's test for correlated proportions, paired-sample t-tests, and measures of effect size, significant changes with varied effect sizes were found for selected basic needs, as well as physical health, mental health, substance use, and IPV barriers. Findings suggest that social service practitioners could incorporate strengths-based case management and motivational interviewing into their practice. Further research is suggested utilizing longitudinal and controlled studies on evidence-based practice that address pretreatment and assessment strategies involving case management and motivational interviewing.     

Arrow’s theorem of the deductible: Moral hazard and stop-loss in health insurance

The logic of Arrow’s theorem of the deductible, i.e. that it is optimal to focus insurance coverage on the states with largest expenditures, remains at work in a model with ex post moral hazard. The optimal insurance contract takes the form of a system of “implicit deductibles”, resulting in the same indemnities as a contract with full insurance above a variable deductible positively related to the elasticity of medical expenditures with respect to the insurance rate. In a model with a predefined ceiling on expenses, there is no reimbursement for expenses below the stop-loss amount. One motivation to have some insurance below the deductible arises if regular health care expenditures in a situation of standard health have a negative effect on the probability of getting into a state with large medical expenses.     

Planned treatment and outcomes in residential youth care: Evidence from Sweden

A recurring theme in evaluations of Swedish residential youth care is that treatment is often unplanned. Using a data set of teenagers placed in youth care in 1991 (N = 357), we show that planned treatment — in the sense of a known expected duration of treatment — is strongly positively associated with treatment outcomes. In the short term, teenagers with planned treatment are 32% less likely to experience a treatment breakdown and 25% less likely to be reassigned to other forms of residential care after completed treatment. In the long term, teenagers with planned treatment are 21% less likely to engage in criminal behavior and 40% less likely to be hospitalized for mental health problems. The results are robust to controlling for a rich set of potentially confounding factors: Even though observable pre-treatment teenager characteristics explain about one fifth of the variation in criminal behavior 5-10 years after treatment, they have almost no predictive power for whether treatment is planned or unplanned.     

External technology acquisition and product innovativeness: The moderating roles of R&D investment and configurational context

An increasing number of studies in technology/innovation management contribute to the understanding of the relationship between external technology acquisition and product innovation performance. On the other hand, the meta-analytic reviews of new product development literature indicate a positive impact of product innovativeness on product innovation performance. However, existing research has not examined the link between external technology acquisition and product innovativeness. This study, therefore, aims to fill this gap of knowledge by investigating the external technology acquisition—product innovativeness relationship and examining the moderating roles of R&D investment and configurational context on this link. Based on a panel sample of 105 high-technology firms over a six-year period, a least squared dummy variable s model reveals interesting results. First, external technology acquisition has a positive impact on product innovativeness. Second, R&D investment increases the effect of external technology acquisition on product innovativeness. Lastly, firm size exhibits a negative effect on the contribution of external technology acquisition to product innovativeness. However, firm age positively impacts the relationship between external technology acquisition and product innovativeness. In addition, this study reveals a positive effect of product innovativeness on firm growth.     

Your Place or Mine? On the Residence Choice of Young Couples in Norway

Norwegian registry data are used to investigate the location decisions of a full population cohort of young adults as they complete their education, establish separate households, and form their own families. We find that the labor market opportunities and family ties of both partners affect these location choices. Surprisingly, married men live significantly closer to their own parents than do married women, even if they have children, and this difference cannot be explained by differences in observed characteristics. The principal source of excess female distance from parents in this population is the relatively low mobility of men without a college degree, particularly in rural areas. Despite evidence that intergenerational resource flows, such as childcare and eldercare, are particularly important between women and their parents, the family connections of husbands appear to dominate the location decisions of less-educated married couples.