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Title Pre-Analysis Plan for Summer 2018 Immigration Experiment
Post date 08/14/2018
C1 Background and Explanation of Rationale The experiment has seven steps: 1. We recruited voters to join an online survey panel. The voters were recruited via mail sent to the address at which they were registered to vote. This mail directed them to an online survey. 2. Among voters who completed the baseline survey, we randomly assigned voters to receive a long treatment conversation on immigration, a short treatment conversation on immigration or a placebo conversation. This random assignment took place at the household level, within blocks defined by household size and the first factor from factor analysis on a number of pre-treatment covariates about immigration. We dropped voters who were above the 90th percentile within the voter’s stateon both of two indices formed by the policy and prejudice items, respectively, as these voters should not see any persuasive effects due to a ceiling effect. This was approximately 5% of voters in pilot data. 3. The partner group implements the canvass, delivering either a persuasion conversation or a placebo conversation depending on the voter’s random assignment. Voters do not realize the canvassing is connected to the survey in any way. 4. We invite voters who were successfully reached (compliers) to take a follow-up survey. 5. We analyze the results of this survey to assess the effects of the conversations. In particular, we compare the views of voters who received the immigration conversations to those who received the placebo conversations. How we plan to do so is described below. 6. We will assess how long-lasting the persuasive effects of the canvass are by continuing to send follow-up survey waves.
C2 What are the hypotheses to be tested? Does the canvass decrease anti-immigrant prejudice and increase support for immigrant rights? Which canvass is more effective?
C3 How will these hypotheses be tested? * Regression analysis.
C4 Country United States
C5 Scale (# of Units) 10000
C6 Was a power analysis conducted prior to data collection? Yes
C7 Has this research received Insitutional Review Board (IRB) or ethics committee approval? Yes
C8 IRB Number not provided by authors
C9 Date of IRB Approval not provided by authors
C10 Will the intervention be implemented by the researcher or a third party? Researchers, Third party: Anonymous
C11 Did any of the research team receive remuneration from the implementing agency for taking part in this research? No
C12 If relevant, is there an advance agreement with the implementation group that all results can be published? Yes
C13 JEL Classification(s) not provided by authors