Scott Sumner is an “open borders skeptic” in the sense that he has broad sympathy with the open borders position but has reservations about embracing it wholeheartedly. This puts him in a similar category as Tyler Cowen, though his view of open borders, and of open borders advocacy, appears more favorable than Cowen’s.

Below is a list of Sumner’s blog posts where he discusses and engages with the open borders position:

• The case for 80% tax rates on the rich, The Money Illusion, April 28, 2014. Discussed in an Open Borders Action Group post Scott Sumner on open borders by Carl Shulman.
• Can we have confidence in our opinions on immigration?, EconLog, May 30, 2014. Linked in an Open Borders Action Group post by John Lee.