Title,Url,Last update date,Published at,First registered on,RCT_ID,DOI Number,Primary Investigator,Status,Start date,End date,Keywords,Country names,Other Primary Investigators,Jel code,Secondary IDs,Abstract,External Links,Sponsors,Partners,Intervention start date,Intervention end date,Intervention,Primary outcome end points,Primary outcome explanation,Secondary outcome end points,Secondary outcome explanation,Experimental design,Experimental design details,Randomization method,Randomization unit,Sample size number clusters,Sample size number observations,Sample size number arms,Minimum effect size,IRB,Analysis Plan Documents,Intervention completion date,Data collection completion,Data collection completion date,Number of clusters,Attrition correlated,Total number of observations,Treatment arms,Public data,Public data url,Program files,Program files url,Post trial documents csv,Relevant papers for csv Charter-School Management Organizations: Diverse Strategies and Diverse Student Impacts,http://www.socialscienceregistry.org/trials/639,"February 24, 2015",2015-02-24 13:56:59 -0500,2015-02-24,AEARCTR-0000639,10.1257/rct.639-1.0,Brian Gill bgill@mathematica-mpr.com,completed,2005-03-01,2012-01-31,"[""education"", ""Charter schools""]",United States of America (),Joshua Haimson (JHaimson@mathematica-mpr.com) Mathematica Policy Research,I21,"","The National Study of CMO Effectiveness is a longitudinal research effort designed to measure how nonprofit charter school management organizations (CMOs) affect student achievement and to examine the internal structures, practices, and policy contexts that may influence these outcomes. The study examines CMO impacts on student achievement in middle school, high school graduation, and postsecondary enrolment using quasi-experimental methods for a large sample of schools. In a smaller sample of oversubscribed schools, we obtain experimental CMO impacts in elementary, middle and high schools using lottery data.","Description: CMO Project Landing Page Url: http://www.mathematica-mpr.com/our-publications-and-findings/projects/charter-management-organization-effectiveness ","","",2005-03-01,2009-06-01,"The intervention is the offer to attend an oversubscribed charter-school management organization (CMO) school. CMOs establish and operate multiple charter schools, representing one prominent attempt to bring high performance to scale. Many CMOs were created in order to replicate educational approaches that appeared to be effective, particularly among disadvantaged students. ","For middle and high schools, the outcomes are math and reading test scores one year after baseline. For elementary schools, the outcomes are math and reading test scores four years after baseline.","",,,"CMO schools with more applicants than available seats often admit students using a random lottery. Records from these lotteries can be used to conduct a randomized experiment as students who participated are offered CMO admission completely by chance. Experimental treatment and control status was determined by whether the student received an admission offer at the time of the lottery. Experimental sites had to meet each of the following criteria to be included in the analysis: 1. Low student attrition. Specifically, the overall and differential attrition rates must be lower than the What Works Clearinghouse maximum thresholds (liberal attrition standard); 2. Valid randomization. If we did not observe the lottery and consequently were unsure of the randomization validity, any difference between treatment and control average baseline test scores must be less than 0.25 standard deviations and demographicdifferences must be less than 25 percentage points 3. Higher treatment group CMO enrollment. The difference in CMO school enrollment between treatment and control groups must be at least 20 percent. ","",Randomization conducted by individual schools.,The unit of randomization is the student. ,"16 schools across 7 sites, where sites are groups of schools that shared applicants. Grouping schools into sites was necessary as treatment was defined as receiving an offer to any CMO school.","Elementary schools: 64 treatment students, 54 control students; Middle schools: 331 treatment students, 551 control students; High schools: 214 treatment students, 214 control students",16 schools across 7 sites (both treatment and control),"","Name: P/PV Institutional Review Board Approval_number: 08-NIRB-054 Approval_date: 2008-08-26 ",None,,true,,"",,"","",,"",,"","","Abstract: Citation: URL: http://www.mathematica-mpr.com/~/media/publications/pdfs/education/cmo_final_updated.pdf "