The Effect of the Affordable Care Act Medicaid Expansion on Marriage, Matt Hampton and Otto Lenhart, in Economic Inquiry, 2022, right here: https://onlinelibrary.wiley.com/doi/10.1111/ecin.13052.
This article builds on a theme developed in Food for Thought question #2 in Chapter 8, concerning experimental content in a geographic context. Though the article doesn't explicitly address the issue of experimental content, the concerns it implies are (probably) adequately addressed through the use of by-now standard econometric procedures. Nonetheless, there still is room for improvement, so it is useful to compare the estimation strategies used in this paper to those advocated in the book.