Table 5.

Heterogeneity in health impacts of internet use by age.

Matching algorithm	Age ≤ 60				Age > 60
	ATT	S.E.	T-statistics	Rosenbaum bounds	ATT	S.E.	T-statistics	Rosenbaum bounds
NN(1)	−0.671	0.242	−2.77***	1.61–1.62	−1.987	0.406	−4.90***	3.00–3.01
NN(5)	−0.699	0.200	−3.49***	1.98–1.99	−1.390	0.326	−4.26***	3.23–3.24
NN(10)	−0.647	0.197	−3.28***	1.98–1.99	−1.264	0.320	−3.95***	3.19–3.20
Radius	−0.679	0.197	−3.45***	2.04–2.05	−1.336	0.328	−4.07***	3.33–3.34
Kernel	−0.790	0.183	−4.31***	2.55–2.56	−1.535	0.281	−5.46***	4.31–4.32

Authors' own computation.

^*** indicates the significance level of 1%.