How to study political activists: A petition survey approach.

A major challenge for social movement and political campaign studies is generating large, representative samples of political activists. This paper outlines a strategy of surveying those who participate in a common, baseline form of political action: signing petitions. Similar to protest surveys, signing a petition constitutes a more baseline low cost/low risk form of political activism. In 26 states in the U.S. petition lists are public record and, with modest effort, can be used to study a wide variety of issues, groups and campaigns. We outline the steps and costs involved in such a petition survey and how to improve response rate. To assess response bias, we compare demographic and political affiliation measures acquired from a marketing analytics company (Experian) for respondents and non-respondents to our survey of petition signers for two state-level initiative elections, finding only modest and interpretable response bias. The methods presented here have broader implications for survey research in general.