In the past few decades, we have seen a rapid proliferation in the use of quasi-experimental research designs in education research. This trend, stemming in part from the “credibility revolution” in the social sciences, particularly economics, is notable along with the increasing use of randomized controlled trials in the strive toward rigorous causal inference. The overarching purpose of this chapter is to explore and document the growth, applicability, promise, and limitations of quasi-experimental research designs in education research. We first provide an overview of widely used quasi-experimental research methods in this growing literature, with particular emphasis on articles from the top ranked education research journals, including those published by the American Educational Research Association. Next, we demonstrate the applicability and promise of these methods in enhancing our understanding of the causal effects of education policies and interventions using key examples and case studies culled from the extant literature across the pre-K–16 education spectrum. Finally, we explore the limitations of these methods and conclude with thoughts on how education researchers can adapt these innovative, interdisciplinary techniques to further our understanding of some of the most enduring questions in educational policy and practice.

This systematic synthesis examines the intended and unintended consequences of performance-based funding (PBF) policies in higher education. Within this synthesis, we focus particularly on evidence from research studies with strong causal inference designs in an effort to understand the impacts of these policies. PBF adoption is generally associated with null or modest positive effects on the intended outcomes of retention and graduation, but there is also compelling evidence that PBF policies lead to unintended outcomes related to restricting access, gaming of the PBF system, and disadvantages for underserved student groups and under-resourced institution types. PBF policies including equity provisions for colleges that enroll or graduate underserved student groups have been found to offset some of these unintended consequences. Based on this synthesis, we offer policy recommendations and directions for future research on PBF policies, including the need to consider variation in policy design and the broader state policy context.

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The test-optional movement in the United States emerged largely in response to criticism of standardized admissions tests as inadequate and potentially biased measures of postsecondary promise. Although anecdotal reports suggest that test-optional policies have improved campus diversity, empirical research has not yet confirmed this claim. Consequently, this study employs quasi-experimental techniques to assess the relationship between test-optional policy implementation and subsequent growth in the proportion of low-income and minority students enrolling at adopting liberal arts colleges. It also examines whether test-optional policies increase institutional standing through greater application numbers and higher reported Scholastic Aptitude Test (SAT) scores. Results show that, on average, test-optional policies enhance the perceived selectivity, rather than the diversity, of participating institutions.

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