Correcting Bias in Perceptions of Public Opinion Among American Elected Officials: Results from Two Field Experiments

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Suggested citation: 

Kalla, Joshua L. & Ethan Porter (2021). Replication Materials for, “Correcting Bias in Perceptions of Public Opinion Among American Elected Officials: Results from Two Field Experiments.” ISPS Data Archive.


Joshua L. Kalla, Ethan Porter

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Field Date: 
2017-10-10 - 2018-01-03
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The starting universe for the experiment was all sitting United States state legislators in either the upper or lower chamber. We then limited the experiment to legislators we could identify as either Democrat or Republican (no independents were included), for whom we had contact information (email address and phone number), and for whom we could get 2016 presidential voting results.
Randomization procedure: 
We randomly assigned each state legislator to receive access to public opinion estimates on a random set of four of the eight issues. Next, we randomly assigned legislators to receive either polling estimates specific to their district or polling estimates covering the four broad US Census regions for the four randomly selected issues.
Treatments varied in two ways. First, state legislators could receive polling on 4 out of 8 possible policy issues. Second, state legislators were provided either with a regional polling aggregate (a placebo condition) or their district-specific polling.
Treatment administration: 
Web delivered
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Archive date: 
Terms of use: 

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Area of study: 
Data file numbersort descending Description File format Size File url
D166F02 Data: access data .csv 414331 Download file
D166F03 Data: long data .csv 73740 Download file
D166F04 Data: access data 2018 .csv 298949 Download file
D166F05 Data: long data 20018 .csv 6258 Download file
D166F06 Program file .do 3076 Download file
D166F07 Codebook: access data .csv 4813 Download file
D166F08 Codebook: long data .csv 3038 Download file
D166F09 Supplementary materials .rmd 75424 Download file
D166F10 Treatment materials .pdf 185764 Download file
D166F11 Treatment materials .pdf 80125 Download file
D166F12 Treatment materials .pdf 283431 Download file
D166F13 Treatment materials .pdf 295595 Download file
D166F14 Supplementary materials .png 50485 Download file
D166F15 Supplementary materials .png 50485 Download file
D166F16 Curator report .pdf 783104 Download file
D166F17 Metadata (DDI 3.2) .xml 136191 Download file