Claims about polarization

…when it comes to moral issues, the prominent change is a partisan secular trend, in which both Democrats and Republicans are adopting more progressive views on moral issues, although at a different rate. While Democrats are early adopters of progressive views, Republicans adopt the same views at a slower pace. This secular change can be easily (mis)interpreted as a sign of polarization because, at the onset of the process, the gap between party supporters broadens due to faster pace at which Democrats adopt progressive views, and only toward the end, the gap between partisan supporters decreases.

That is from a new paper by Baldassari and Park, via Gaurav Sood.