Interesting research from a large team of intermediate econ instructors: On average, students learned less during the pandemic-afflicted semester than in prior semesters, with effects sizes of about 0.1-0.2 SD's on a standardized econ test. #teachecon
http://ftp.iza.org/dp13813.pdf 

Two striking effects here:
1. Huge diffs across instructors, with some adapting well, and others struggling. It's worth being intentional about who teaches big courses online.
2. Not much evidence the pandemic created *extra* problems for students from disadvantaged groups.

The most exciting (and somewhat speculative) finding is instructors who had prior experience with online instruction did nearly as well during the pandemic.

It suggests that remote teaching is a skill, and that it can be learned. And it makes me optimistic we can do a great job.

If other econ instructors have compared their students' performance pre- versus post-pandemic, I would love to hear what you've learned. (Sadly, my tests vary too much from year to year to make reliable comparisons.)

Fellow econs: Please add any related evidence to this thread.

Tagging the authors of this study: @econjimberry, @TeachBetterCo, @AustinBoyleEcon, @tyleransom plus George Orlov, Thomas DiCiccio, Alex Rees-Jones and Jörg Stoye, who I couldn't find on here