. 2012 Jun 11;109(27):10815–10820. doi: 10.1073/pnas.1115571109

Table 1.

Price experiment estimates

	Efficiency cookstove					Chimney cookstove
	Initial acceptance		Refusal^†	Final acceptance		Initial acceptance		Refusal^†	Final acceptance
Independent variable	1	2	3	4	5	6	7	8	9	10
Subsidy (50%)	0.252^***	0.256^*	−0.134^*	0.116^**	0.079	0.031	0.186^**	−0.132^**	0.054^**	0.065
	(0.085)	(0.136)	(0.070)	(0.045)	(0.083)	(0.062)	(0.071)	(0.054)	(0.024)	(0.041)
Household wealth index^‡		0.061^***	−0.036		0.019^**		0.061^***	−0.028^*		0.002
		(0.013)	(0.022)		(0.008)		(0.016)	(0.016)		(0.003)
Household expenditures		0.000^*	−0.000		0.000		0.000^***	−0.000		0.000
		(0.000)	(0.000)		(0.000)		(0.000)	(0.000)		(0.000)
Children under age 5 y, n		−0.042^**	0.004		−0.017^*		0.002	−0.001		−0.009^*
		(0.019)	(0.031)		(0.009)		(0.026)	(0.014)		(0.004)
Region (Hatiya upazilla)		0.013	−0.070		0.024		−0.016	0.127^**		−0.031^**
		(0.084)	(0.074)		(0.026)		(0.077)	(0.056)		(0.013)
Subsidy (50%) × household wealth index		−0.009			0.016		0.016			0.027^**
		(0.022)			(0.019)		(0.022)			(0.013)
Subsidy (50%) × household expenditures		0.000			0.000		−0.000^***			−0.000
		(0.000)			(0.000)		(0.000)			(0.000)
Subsidy (50%) × children under age 5 y, n		0.058^*			0.029		−0.022			0.014
		(0.033)			(0.025)		(0.042)			(0.012)
Subsidy (50%) × region (Hatiya upazilla)		−0.167			−0.049		−0.066			−0.031
		(0.159)			(0.086)		(0.099)			(0.038)
Constant	0.233^***	0.228^***	0.866^***	0.046^***	0.041^*	0.314^***	0.227^***	0.892^***	0.020^**	0.034^*
	(0.041)	(0.033)	(0.059)	(0.013)	(0.020)	(0.044)	(0.059)	(0.056)	(0.009)	(0.017)
Observations	1,184	1,183	410	1,184	1,183	1,096	1,095	360	1,096	1,095
R²	0.069	0.116	0.037	0.037	0.059	0.001	0.057	0.086	0.016	0.051

Robust SEs clustered by village (the unit of randomization) are given in parentheses below values in all specifications. *Significance at 90%; **significance at 95%; ***significance at 99%. Data on household wealth, expenditures, and number of children under 5 are taken from survey responses given by the male household head.

^†Dependent variable Refusal is only defined for those households who initially accepted the cookstove offer. Note that this is a nonrandom subsample of all households.

^‡The household wealth index was constructed by using principal component analysis on the basis of five variables: the respondent’s self-assessment of the household’s affluence on a scale of 1–5 and measures of the four separate categories of household assets—land, vehicles, animals, and cash savings.