Parenting with a Disability and Child Mental Health: A Propensity Score Analysis

Little research has examined the impact of having a parent with a disability on child mental health. This study used data from 7,116 families of children who participated in the 2006 National Health Interview Survey and propensity score matching (PSM) to investigate this question. Prior to PSM, differences in Child Mental Health Brief scores were significant with a moderate effect size. After PSM, differences in Child Mental Health Brief scores were still significant, but the effect size was small. Results indicate that much of the mental health risk for children of parents with disabilities is connected to related issues.     

The socioeconomic gradient in health: how important is material deprivation?

In this paper we use the Spanish Living Conditions Survey (2005–2008) to investigate the existence of a socioeconomic gradient in health when alternative measures of socioeconomic status, apart from income, are considered. In particular we construct a material deprivation index that reflects minimum standards of quality of life and that incorporates comparison effects with societal peers and we estimate health equations with probit adapted least squares, fixed effects and instrumental variables. Our results reveal that the relationship between health and income operates through comparison information with respect to societal peers. In contrast, material deprivation in terms of financial difficulties, basic necessities and housing conditions exerts a direct effect on individual health. Mixed evidence is found with respect to gender.     

Motivation vs. relevance: Using strong ties to find a job in Urban China

While the idea that contacts matter in finding a job is intuitively appealing, we still do not know—after decades of research—how and why strong ties benefit job seekers. To resolve this confusion, we need to theorize how specific characteristics of ties are related to the mechanisms that make job search through contacts effective. We have reasons to expect that, while a contact’s motivation influences the likelihood that a job seeker receives an offer, her homophily with the job seeker on occupation and other job-relevant attributes influences the quality of the offer. The use of strong ties among university students to find jobs in China provides a unique opportunity to empirically isolate the relationship between contact characteristics and the mechanisms through which contacts benefit the job seeker. I tested my hypotheses with data on both the successful and unsuccessful job searches of 478 graduates of China’s flagship universities, who, as first-time job seekers, primarily used strong ties. Survey results are consistent with my hypotheses: job seekers who used strong ties to look for jobs had more offers—but not better offers—than those who used only formal methods.     

The facility location problem with Bernoulli demands

This paper presents the facility location problem with Bernoulli demands. In this capacitated discrete location stochastic problem the goal is to define an a priori solution for the locations of the facilities and for the allocation of customers to the operating facilities that minimizes the sum of the fixed costs of the open facilities plus the expected value of the recourse function. The problem is formulated as a two-stage stochastic program and two different recourse actions are considered. For each of them, a closed form is presented for the recourse function and a deterministic equivalent formulation is obtained for the case in which the probability of demand is the same for all customers. Numerical results from computational experiments are presented and analyzed.     

Economic Gender gap in the Global South: How Public Institutions Matter

One of the most challenging gender gaps in the Global South remains in the economic sphere. This paper examines how public institutions affect the gender gap in economic participation and opportunities in 74 developing and emerging countries during the period 2006–2016. We find that the public institutional environment is closely related to the economic gender gap. Specifically, the protection of property rights and guaranteeing security seem to be two key factors associated to lower economic gender inequality. Nevertheless, public institutions do not matter equally throughout economically backward countries. Whereas in emerging countries, particularly in Latin America and the Caribbean, a broad variety of institutional aspects, including undue influence on judicial and government decisions, are closely related to the economic gender gap, in low-income developing countries, such as Sub-Saharan countries, the problems of ethics and corruption stand out as a particularly remarkable element against economic gender equality. Some significant policy implications are derived from our findings regarding the potential of public institution reforms to reduce the economic gender gap.

     

Modified Hamiltonian Monte Carlo for Bayesian inference

Statistics and Computing - The Hamiltonian Monte Carlo (HMC) method has been recognized as a powerful sampling tool in computational statistics. We show that performance of HMC can be significantly...     

Ethical challenges of community based participatory research: exploring researchers’ experience

Community-Based Participatory Research (CBPR) has been proposed as an equitable, empowering partnership approach to collaborative research. International literature about the ethical implications of CBPR suggests a continuing strong interest in the topic. However, there is a notable lack of research that captures the experience of ethical challenges of researchers from different countries who engage in CBPR. The aim of this research was to address this lack of evidence by exploring researchers’ experience of ethical challenges in CBPR at an international level. An innovative data collection method was designed utilising a purpose-built blog. Balancing participant protection and autonomy, partnership tensions, and enduring impacts of the researcher role emerged as the main themes. These findings illustrate the specific conflicts faced by researchers engaged in CBPR. This is largely as a result of the complexities of CBPR coupled with rigid ethics committee review that does not always take into account the more fluid nature of the approach.     

Ratio tests of a unit root

Based on the maximal invariant principle, we derive two ratio tests (locally best invariant test and point optimal test) for a unit root and compare them with previously proposed ratio tests. We also show that our ratio tests tend to have better powers than the Dickey-Fuller test and the modified Dickey-Fuller test.     

Best linear unbiased and invariant estimation in location-scale families based on double-ranked set sampling

Abstract

In this article, we propose the best linear unbiased estimators (BLUEs) and best linear invariant estimators (BLIEs) for the unknown parameters of location-scale family of distributions based on double-ranked set sampling (DRSS) using perfect and imperfect rankings. These estimators are then compared with the BLUEs and BLIEs based on ranked set sampling (RSS). It is shown that under perfect ranking, the proposed estimators are uniformly better than the BLUEs and BLIEs obtained via RSS. We also propose the best linear unbiased quantile (BLUQ) and the best linear invariant quantile (BLIQ) estimators for normal distribution under DRSS. It is observed that the proposed quantile estimators are more efficient than the BLUQ and BLIQ estimators based on RSS for both perfect and imperfect orderings.