Large-scale Assessments in Education

An IERI – International Educational Research Institute Journal

Table 5 Estimates in alternative DiD models for the PIRLS study

From: Is computer availability at home causally related to reading achievement in grade 4? A longitudinal difference in differences approach to IEA data from 1991 to 2006

Variables	C1				C2				C3				C1INT
Variables	b	se	t	p	b	se	t	p	b	se	t	p	b	se	t	p
ComputersC	−0.62	0.20	−3.05	0.002					−0.49	0.21	−2.38	0.017	−0.47	0.23	−2.05	0.040
BorrowC					0.18	0.06	3.19	0.001	0.14	0.06	2.35	0.019
Girl													0.12	0.02	7.94	0.000
Language at home													0.22	0.02	9.50	0.000
Books at home													0.19	0.01	14.73	0.000
ComputersC × girl													0.25	0.11	2.20	0.028
ComputersC × language													−0.22	0.25	−0.89	0.374
ComputersC × books													−0.19	0.11	−1.75	0.080

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