Table 3.

Trends in population and housing characteristics pre-program: by treatment group.

	C2003		T1998		T1999		Difference-in-differences
	Change	SD	Change	SD	Change	SD	(T1998- C2003)	t-stat	(T1999- C2003)	t-stat
Population between 6 and 14	3.6	17.9	−0.6	17.7	−1.2	17.8	−4.24	−2.20	−4.84	−2.29
Population over 15	10.4	37.1	1.2	31.0	0.7	29.6	−9.26	−2.40	−9.72	−2.39
% Population between 5 and 14 able to read	5%	0.19	4%	0.13	2%	0.13	−0.01	−0.65	−0.03	−1.37
% Population over 15 able to read	2%	0.12	3%	0.07	3%	0.07	0.02	1.29	0.01	0.76
% Population speaks indigenous language	0%	0.07	0%	0.06	−1%	0.09	−0.00	−0.30	−0.01	−1.07
% Population speaks indigenous language and not spanish	−13%	0.24	−17%	0.29	−16%	0.29	−0.04	−1.28	−0.03	−0.87
Inhabitant per house	−0.2	0.81	−0.5	0.56	−0.4	0.62	−0.29	−3.60	−0.22	−2.57
% Houses with electricity	7%	0.21	12%	0.33	12%	0.29	0.05	2.00	0.05	1.84
Observations	116		320		186

^*Sources: 2000 Census and 1995 Conteo Surveys.