Return To Sender, Eventually, Ctd

Sarah Kliff recently claimed that the USPS is “the very best internationally at its most crucial task: Delivering mail.” Adam Ozimek finds a problem with the study Kliff cites:

[T]he letters in the study were sent from Cambridge, Massachusetts. Is it really surprising that letters sent from one U.S. address to another U.S. address and back were returned faster than letters sent to from a U.S. address to New Zealand and back?