“…Further, several studies find that PCAOB inspections improve perceived or actual firm‐wide audit quality (see, e.g., DeFond and Lennox [2017], Fung, Raman, and Zhu [2017], Gipper, Leuz, and Maffett [2020], Westermann, Cohen, and Trompeter [2019]). The model of Gao and Zhang [2019] also features ex ante investment by auditors, termed “expertise,” which is one interpretation of our audit quality variable, .…”