Lower posterior death probabilities from a quick medical response in road traffic accidents

Introduction: We use data from Spain on roads and motorways traffic accidents in May 2004 to quantify the statistical association between quick medical response time and mortality rate. Method: Probit and logit parameters are estimated by a Bayesian method in which samples from the posterior densities are obtained through an MCMC simulation scheme. We provide posterior credible intervals and posterior partial effects of a quick medical response at several time levels over which we express our prior beliefs. Results: A reduction of 5 min, from a 25-min response-time level, is associated with lower posterior probabilities of death in roads and motorways accidents of 24% and 30%, respectively.     

Dynamic microeconomic models of fertility choice: a survey

We review existing approaches to the specification and estimation of dynamic microeconomic models of fertility. Dynamic fertility models explain the evolution of fertility variates over the life-cycle as the solution to a dynamic programming model involving economic choices. Dynamic models may be classified into structural and reduced-form models. Structural models generally require solution of the underlying dynamic programming problem. Reduced-form models, while based on a structural specification, do not. Recent innovations in estimation methodologies make both types practical and realistic alternatives to static models of lifetime fertility. JEL classification: J13, C41, C61 Received August 26, 1994/Accepted October 23, 1996     

Cohabitors’ Reasons for Living Together,Satisfaction with Sacrifices,and Relationship Quality

The purpose of our study was to identify both negative and positive associations of cohabitation with relationship quality. Using a sample of 280 cohabitors, we examined how reasons for cohabitation (i.e., spending time together, testing the relationship, and convenience) are associated with relationship quality (i.e., commitment, satisfaction, ambivalence, and conflict) as moderated by satisfaction with sacrifices. Results showed that a higher score on spending time together as a reason for cohabitation was linked with greater commitment and satisfaction and lower ambivalence and conflict, even when cohabitors reported lower satisfaction with sacrifices. In contrast, a higher score on testing the relationship as a reason for cohabitation was linked with more ambivalence regardless of the level of satisfaction with sacrifices. Finally, a higher score on convenience as a reason for cohabitation was linked with lower commitment, including when cohabitors reported lower satisfaction with sacrifices. Collectively, our results are important in demonstrating the positive and negative aspects of cohabitation in association with relationship quality and when satisfaction with sacrifices moderates such associations.     

Investigating the impact of Hurricane Maria on an ongoing birth cohort in Puerto Rico

Population and Environment - Prior to Hurricane Maria, Puerto Rico already had 200+ hazardous waste sites, significant contamination of water resources, and among the highest rates of preterm birth...     

A national evaluation of Safe Schools/Healthy Students: outcomes and influences

The Safe Schools/Healthy Students (SS/HS) Initiative has awarded over $2 billion in grants to more than 350 school districts in partnership with local mental health, law enforcement, and juvenile justice agencies. To estimate the impact of grantee characteristics, grant operations, and near-term outcomes in reducing violence and substance use, promoting mental health, and enhancing school safety, logged odds ratios (LORs) were calculated contrasting Year 3 with Baseline performance from grantee-provided data on seven outcome measures. After comparing grantee performance across outcomes and outcomes across grantees, the LORs were entered as dependent variables in a series of meta-regressions in which grantee characteristics, grant operations, and near-term outcomes were tested after controlling for pre-grant characteristics. Findings indicate that the SS/HS Initiative significantly improved most outcomes, that within-grantee performance varied greatly by outcome, and that random-effects meta-regression appreciably decreased the variance available for modeling. The approach demonstrates that the SS/HS Initiative is effective and that locally collected performance data can be used to estimate grantee success in improving youth outcomes.     

Maternal Care and Control as Mediators in the Relationship Between Mothers’ and Adult Children’s Psychosocial Problems

The current research investigated the relationship between mothers’ and adult children’s psychosocial problems through two different aspects of maternal interactions. Data were collected from family triads (N = 286), including a mother, a child, and a sibling. Mothers and their adult children completed measures of depression, loneliness, and self-esteem. The assessment of the maternal interaction variables (i.e., maternal care and maternal control) involved the perspectives of a sibling to minimize common method variance. Results partially supported the hypothesized model, wherein maternal care (but not maternal control) mediated the relationship between mothers’ depression, loneliness, and self-esteem to that of their children. Specifically, mothers who reported higher levels of psychosocial problems had children who reported that their mothers were less caring and, in turn, less maternal care was associated with higher levels of psychosocial problems in their young adult children.     

Appearance-Related Communication and Body Image Outcomes: Fat Talk and Old Talk Among Mothers and Daughters

The current study sought to investigate mothers’ and daughters’ appearance-related communication and its relation to body image outcomes. Participants included 199 mother-daughter dyads that completed online questionnaires containing measures of fat talk, old talk, body dissatisfaction, body surveillance, drive for thinness, and bulimic tendencies. Actor-partner interdependence models revealed that (a) mothers’ and daughters’ fat talk, but not old talk, were significantly related to one another, (b) mothers’ and daughters’ fat talk and old talk were significantly related to their own body image outcomes, (c) mothers’ fat talk was positively related to daughters’ bulimic tendencies, and (d) mothers’ old talk was positively related to daughters’ body dissatisfaction. These results suggest that engaging in appearance-related communication is problematic for the person making the comments and, to some extent, being exposed to another person’s appearance-related comments can be harmful to the individual as well—at least for the daughters in the current sample.     

TESTING A PRODUCTION-BASED ASSET-PRICING MODEL

We develop a dynamic production-based asset-pricing model from the solution cf a representative firm's investment and financing problem. Nonnegative correlation between capital stocks and asset returns is accommodated, as well as equity premia arisingfrom dtfferential costs of stock versus bondfinance. Under our adjustment-costs specfication, the returns on the firm's financial instruments become linear functions of the firm's average capital productivity, its investment-capital ratio, and financial instrument-specific costs. Empirical tests using U.S. T-bill rates and common stock returns yield plausible parameter estima tes and coofrm the significance qfthesefictors.