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Evaluation of the DC Opportunity Scholarship Program:

NCEE 2009-4050
March 2009

Table 3.  Year 3 Impact Estimates of the Offer and Use of a Scholarship on the Full Sample: Academic Achievement

  Impact of the Scholarship Offer (ITT) Impact of Scholarship Use (IOT)  
Student Achievement Treatment Group Mean Control Group Mean Difference (Estimated Impact) Effect Size Adjusted Impact Estimate Effect Size p-value of estimates
Reading 635.44 630.98 4.46* 0.13 5.27* 0.15 0.01
Math 630.15 629.35 0.81 0.03 0.95 0.03 0.62
*Statistically significant at the 95 percent confidence level.
NOTES: Means are regression adjusted using a consistent set of baseline covariates. Impacts are displayed in terms of scale scores. Effect sizes are in terms of standard deviations. Valid N for reading = 1,460; math = 1,468. Separate reading and math sample weights used.