Hsieh-Moretti on Housing Regulation: A Gracious Admission of Error
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Hsieh-Moretti’s estimate of GDP gains from urbanization is significantly larger than previously thought, with corrected estimates suggesting GDP could be 36% higher over 45 years.

Just an FYI, Bryan Caplan found an error in Moretti’Housing Constraints and Spatial Misallocationwhich was cited in chapter, the effect of pricing people out of cities was understated in paper, "...How then can these enormous changes in the annual growth rate, compounded over 45 years, lead to relatively modest changes in total GDP? Answer: They can’t!The correct estimate to derive from Table 4 is that GDP will be 1.0149^45/1.00795^45=+36% higher, not +8.9%...."
This doesn’t impact the use of the paper in chapter, will attached it the entry as a note as an FYI, “…authors and referees alike focused so intently on the advanced mathematics that they glossed over some elementary yet crucial errors. And this is roughly what Hsieh told me:The referees requested some changes to the text (not the tables, which look fine), but these were inconsistently implemented….”
Bryan Caplan, "Hsieh-Moretti on Housing Regulation: A Gracious Admission of Error,"The Library Of Economic And Liberty, April 4, 2021, https://www.econlib.org/a-correction-on-housing-regulation/


