Because studies examining youth drug use often have data with a high proportion of zeros, they often do not meet the assumptions for univariate or linear regression analyses that are typically used. We demonstrate the use of zero-inflated negative binomial regression models to address excessive zeros in drug use frequency on perceptions of…

Which factors promote student transfer from California Community Colleges (CCC) to baccalaureate-granting institutions? How do community college practices support this transition? Which student behaviors and characteristics particularly facilitate their movement to four-year colleges and universities? The Research and Planning Group for California…

This study was conducted to determine how library users in California say library use helps them. While most library effectiveness studies infer effectiveness by looking at the movement of materials or reports of user satisfaction, this study proceeds from the assumption that libraries need to know how library use helps in user terms. The study…