Chang-Tai Hsieh and Enrico Moretti’s 2019 paper, “Housing Constraints and Spatial Misallocation,” is an influential work on the economic effects of zoning. It found that exclusionary zoning restrictions in major US metro areas had large negative effects on the economy, leading to an 8.9% lower GDP in 2009. However, methodological errors were found by economist Bryan Caplan in 2021, and further critique by Brian Greaney of the University of Washington has called into question the strength of their conclusions. Hsieh has responded to Greaney’s critique, and the debate is ongoing with no clear resolution yet. Greaney’s paper has not been published and its status in peer review is uncertain. In light of this, scholars and policy analysts are urged to be cautious in citing the Hsieh-Moretti study until these doubts are resolved. The validity of the article has been called into question, which weakens the case against zoning. Despite this, the overall negative effects of zoning on the economy, housing availability, and opportunities for the poor and minorities continue to be supported by other research. The case for the abolition of most housing construction restrictions remains intact, but the doubts about the Hsieh-Moretti article must be considered in evaluating this position.