A second paper based on the CES, co-authored by Stuart Soroka, a political science professor at the University of Michigan, examined “partisan sorting” in Canada. The term refers to whether people who hold certain views increasingly find their way to a particular party over time, so that, for instance, people who are in favour of immigration may identify more strongly with the Liberals, while those who are not will find their way to the Conservatives as that issue becomes more important to them. That concept is distinct from but related to polarization, which refers to the attitudes of people on certain issues getting further apart over time.