Open Educational Resources (OER) are regularly adopted, yet questions persist about efficacy. Do OER improve student performance? Research produces ambiguous results, because these are derived from small sample sizes, inadequate efficacy measures, and neglect of interactional effects. We examine the effect of OER on student grades using over…

One frequently cited yet understudied channel through which money matters for college students is course availability--colleges may respond to budgetary pressure by reducing course offerings. Open admissions policies, binding class size constraints, and heavy reliance on state funding may make this channel especially salient at community colleges,…