@techreport{NBERw12471,
 title = "Should Sixth Grade be in Elementary or Middle School? An Analysis of Grade Configuration and Student Behavior",
 author = "Philip J. Cook and Robert MacCoun and Clara Muschkin and Jacob Vigdor",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12471",
 year = "2006",
 month = "August",
 URL = "http://www.nber.org/papers/w12471",
}