The focus of many recent school reforms has been on changing the incentives faced by school administrators, mainly through increased competition. In this study, we assess whether competition amongst public schools influences the efficiency in which these schools operate, using a two-stage estimation procedure and data from the state of Illinois from 1997–1998. We find some evidence that public school districts become more efficient as neighboring districts become more efficient. However, such spillovers only occur if districts operate within a financially flexible environment.