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Impact Evaluation of the LAPD Community Safety Partnership

In 2011, the Los Angeles Police Department (LAPD), in conjunction with other governmental and nonprofit groups, launched the Community Safety Partnership (CSP) in several public housing developments in Los Angeles. Following a relationship-based policing model...

Elements of External Validity: Framework, Design, and Analysis

External validity of randomized experiments is a focus of long-standing debates in the social sciences. While the issue has been extensively studied...

Covariate Selection for Generalizing Experimental Results: Application to a Large-Scale Development Program in Uganda

Scientists are often interested in generalizing causal effects estimated in an experiment to a target population. However, analysts are often constrained by available covariate information...

Equivalence Testing for Regression Discontinuity Designs

Regression discontinuity (RD) designs are increasingly common in political science. They have many advantages, including a known and observable treatment assignment mechanism. The literature has emphasized the need for "falsification tests" and ways to assess the validity of the design. ...

An Equivalence Approach to Balance and Placebo Tests

Recent emphasis on credible causal designs has led to the expectation that scholars justify their research designs by testing the plausibility of their causal identification assumptions, often through balance and placebo tests. Yet current practice...

Dead Man Walking: The Affective Roots of Issue Proximity Between Voters and Parties

Do voters like the party they already agree with or do they agree with the party they already like? Previous studies have suggested a link...

From SATE to PATT: combining experimental with observational studies to estimate population treatment effects

Randomized controlled trials (RCTs) can provide unbiased estimates of sample average treatment effects. However, a common concern is that RCTs may fail to provide unbiased estimates of population average treatment effects. We derive assumptions...