The effect of face masks on Covid-19 transmission is crucial for the health of populations. The effectiveness of face masks in reducing the transmission of Covid-19 varies across primary evidence. To perform a quantitative meta-analysis, we collected 258 estimates from 44 primary studies...

In this meta-analysis we provide new quantitative evidence on the relationship between the characteristics of working contracts and worker's health. We examine 52 studies covering 26 countries in the time period 1984 - 2010 with a combined sample size of 192. We apply a random effects model...

There is mounting evidence indicating that the aging process initiates during early life stages, with in utero the individual's environment playing a significant role. Consequently, it is crucial to understand the enduring effects of early life circumstances on health in old age. In this study,...

There is mounting evidence indicating that the aging process initiates during early life stages, with in utero the individual's environment playing a significant role. Consequently, it is crucial to comprehend the enduring effects of early life circumstances on health in old age. In this study,...

Rationale: Predictions of the demand for, or perceived benefits of, health interventions tend to be made from the results of a single study. This has prompted researchers to explore alternative approaches to derive parameter estimates. The increasing use of WTP in malaria control interventions...

The main objective was to find association between basal cortisol and neighborhood-level stress. Systematic searches, including electronic and hand searches, were conducted. The most recent date of the search was July 26, 2013. Primary observational studies included if they considered stress...

Randomized controlled trials (RCTs) of water treatment are typically powered to detect effects on caregiver-reported diarrhea but not child mortality, as detecting mortality effects requires prohibitively large sample sizes. Consequently, water treatment is seldom included in lists of...

This paper compares two methods for meta-analysis: fixed-effect models and random-effects models. Both models are applied to pass-through rates of excise taxes on alcohol beverages. Using a sample of estimates from 30 primary studies, weighted means are first reported for each method and...