…This brief examines students’ pathways from middle school to matriculation at a specialized high school, and simulates the effects of various admissions criteria that have been proposed as alternatives to the current policy. Analyzing data from 2005 to 2013, we found that while the SHSAT is (by design) the most important factor determining who attends the specialized high schools, it is not the only factor. Many students—including many high-achieving students—do not take the SHSAT at all, and some of those offered admission decide to go to high school elsewhere.