High school dropout has been associated with negative outcomes, including increased rates of unemployment, incarceration, and mortality. Dropout rates vary significantly depending on individual and environmental factors. The purpose of our study was to use an ecological perspective to concurrently explore student- and school-level predictors…

Developmental education has been cited as one of the most difficult issues facing community colleges. Despite the controversy and changes to educational policy regarding developmental education, there is a notable dearth of rigorous research measuring the causal effect of remediation on community college student outcomes. The present study uses…

This research is motivated by an analysis of reading research data. We are interested in modeling the test outcome of ability to fluently recode letters into sounds of kindergarten children aged between 5 and 7. The data showed excessive zero scores (more than 30% of children) on the test. In this dissertation, we carefully examine the models…