Learning in primary > Class size (eLP) > Hoxby 2000

Detailed Information

Country
Country: United States
GDP per capita
31.956
Context details
Elementary schools in Connecticut
Age
Kindergarten - grade 5
Implementation year
1983
Implementer
Government
Duration (months)
28
Cost
A five student reduction from a base of 40 raises costs by only 14.3 percent; but a 5 student reduction from a base of 15 raises costs by 50 percent.
Intervention details
Class size reduction from 25 to 20 students (computed from the original estimate of reducing the class size from 22 to 21); 649 schools participated
Evaluation design
Instrumental variables
Cluster definition
N/A
Sample Outcome Test Source Table Observations Statistics on Effects
Grades 1-3 Math Connecticut achievement test 4 1752 Coeff: -22.03; SE: 15.37; SD: 100.00
Grades 1-5 Math Connecticut achievement test 4 1752 Coeff: -20.59; SE: 17.14; SD: 100.00
Grades 1-3 Language Connecticut achievement test 4 1752 Coeff: -12.60; SE: 10.84; SD: 100.00
Grades 1-5 Language Connecticut achievement test 4 1752 Coeff: -8.43; SE: 14.10; SD: 100.00
Grades 1-5 Math Connecticut achievement test 6 36 Coeff: -6.74; SE: 12.20; SD: 100.00
Grades 1-5 Language Connecticut achievement test 6 36 Coeff: -2.50; SE: 7.96; SD: 100.00
Grades 1-3 Math Connecticut achievement test 6 76 Coeff: 5.06; SE: 10.60; SD: 100.00
Grades 1-3 Language Connecticut achievement test 6 76 Coeff: 7.46; SE: 8.21; SD: 100.00
Grades 1-3 Math Connecticut achievement test 8 147 Coeff: -8.44; SE: 10.01; SD: 100.00
Grades 1-3 Language Connecticut achievement test 8 147 Coeff: -4.68; SE: 6.36; SD: 100.00
Grades 1-5 Math Connecticut achievement test 8 108 Coeff: -1.26; SE: 9.69; SD: 100.00
Grades 1-5 Language Connecticut achievement test 8 108 Coeff: 4.68; SE: 8.28; SD: 100.00