LSP participation substantially reduces academic achievement. Attendance at an LSP-eligible private school lowers math scores by 0.4 standard deviations and increases the likelihood of a failing score by 50 percent. Voucher effects for reading, science and social studies are also negative and large. The negative impacts of vouchers are consistent across income groups, geographic areas, and private school characteristics, and are larger for younger children.
1. Quality of public system alternatives
even if the quality of voucher-participating private schools was identical in every city, they would all show different effects depending on the academic effectiveness of the publicly funded alternatives.2. Curriculum mis-alignment between private schools and the assessment tests of evaluation.