This paper was presented at the Federal Reserve Bank of Boston's 61st Economic Conference, "Are Rules Made to be Broken? Discretion and Monetary Policy," on October 13, 2017. I thank the Boston Fed for asking me to assess the current state of the rules versus discretion debate at the conference, and I thank Matthew Canzoneri, V.V. Chari, Geovanni Olivei, David Papell, Eric Rosengren, and especially my discussant Donald Kohn for helpful comments. The views expressed herein are those of the author and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peer-reviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.