In principle, experiments offer a straightforward method for social scientists to accurately
estimate causal effects. However, scholars often unwittingly distort treatment effect estimates …

This book is intended to fill a gap in the literature on research methods in the social
sciences. To date, methods textbooks have yet to formally incorporate population-based …

Identifying causal mechanisms is a fundamental goal of social science. Researchers seek to
study not only whether one variable affects another but also how such a causal relationship …

Individual perceptions of income distribution play a vital role in political economy and public
finance models, yet there is little evidence regarding their origins or accuracy. This study …

Does a state's use of indiscriminate violence incite insurgent attacks? To date, most existing
theories and empirical studies have concluded that such violence is highly …

This is a comprehensive introduction to research design for university students at all levels
across the whole range of political science, including international relations and public …

This text presents a unified treatment of experimental designs and design concepts
commonly used in practice. It connects the objectives of research to the type of experimental …

In their landmark study of a field experiment, Gerber and Green (2000) found that get-out-the-
vote calls reduce turnout by five percentage points. In this article, I introduce statistical …

Experimentalists are increasingly examining heterogeneous treatment effects, in which
observed individual-level characteristics are hypothesized to moderate an experimental …

Much of what we know about public service motivation comes from self-report measures.
However, self-report questionnaires are vulnerable to social desirability bias due to …