Takings scholarship has long focused on the niceties of Supreme Court doctrine, while ignoring the operation of takings law on the ground in the state and lower federal courts, which together decide the vast bulk of all takings cases. This study, based primarily on an empirical analysis of more than 2000 reported decisions ovcr the period 1979 through 2012, attempts to fill that void. This study establishes that the Supreme Court\u27s categorical rules govern almost no state takings cases, and that takings claims based on government regulation almost invariably fail. By contrast, when takings claims arise out of government action other than regulation, landowners enjoy modest success. In particular, when government actions are taken by of...