Public Opinion and Democracy in Poland Dataset
Piast Institute Polish American Surveys
Replication data for Soroka, Stecula and Wlezien AJPS article
Link to Dataverse
An R Script to convert Roper datasets into Stata
I wrote a simple R script that conveniently converts SPSS formatted .por files from the Roper Center's archives into Stata files, as well as Excel spreadsheets or CSV files. The script is on Github.