Chipman, Herron, and Lewis paper on MN residual vote

Although I kinda like my little memo on the subject, Jonathan Chipman, Michael Herron, and Jeff Lewis have a very interesting and thorough paper on the topic here. One of the bold features of the paper is an effort to use the difference in the residual vote rate between the presidential and senate races as an indicator of intentional abstention.  It deserves close study, which I’ve not been able to give it yet, but its conclusions will send encouragement to the DSCC