Although there is a large literature on social capital, empirical estimates of the effect of social
capital may be biased because of social homophily, the tendency of similar people to …

Despite years of research, methodological and practical obstacles make it difficult to
conclude whether policies aimed at improving schools and communities are effective for …

Case Study Research: Principles and Practices aims to provide a general understanding of
the case study method as well as specific tools for its successful implementation. These tools …

In this second edition of Counterfactuals and Causal Inference, completely revised and
expanded, the essential features of the counterfactual approach to observational data …

When outcomes are missing for reasons beyond an investigator's control, there are two
different ways to adjust a parameter estimate for covariates that may be related both to the …

According to the domain-specific, multilevel homework model proposed in the present study,
students' homework effort is influenced by expectancy and value beliefs, homework …

In a well-designed experiment, random assignment of participants to treatments makes
causal inference straightforward. However, if participants are not randomized (as in …

While there is consistent evidence that inequality in economic resources follows a process of
cumulative advantage, the application of this framework to another aspect of life course …

This article uses panel data from the Survey of Income and Program Participation (SIPP) and
the European Community Household Panel (ECHP) for a comparative analysis of workers' …

社会科学对于因果关系的关注使得倾向值匹配(propensity score matching)
的方法受到越来越多的重视. 本文从以下几个方面对这一方法进行述评. 首先 …