Voter shifts in parliamentary elections in Poland, 2007-2015
How 2015 voters voted in 2007 and 2011 How 2007 voters voted in 2011 and 2015 About POLPAN Where did the current governing party get their votes from? Did supporters of the previous ruling party switch preferences or did they abstain from voting altogether? Cross-sectional datasets, such as one-off election polls, do not typically provide data to answer these questions. Panel studies, such as the Polish Panel Survey (POLPAN), do.