Panel A			Panel B
	SWB	SWB	SWB	SWB	SWB	SWB
	Oprobit	Oprobit	Oprobit	Oprobit	Oprobit	Oprobit
	(1)	(2)	(3)	(4)	(5)	(6)
petrol price	-0.074***	-0.055**	-0.051**	-0.078***	-0.072***	-0.063***
	(-3.754)	(-2.181)	(-2.017)	(-4.069)	(-3.007)	(-2.577)
gender		-0.029	-0.028		-0.021	-0.020
		(-1.375)	(-1.311)		(-1.008)	(-0.945)
age		0.012***	0.012***		0.012***	0.012***
		(9.620)	(9.562)		(9.059)	(9.064)
education		-0.025*	-0.025*		-0.029**	-0.029**
		(-1.727)	(-1.744)		(-2.094)	(-2.127)
married		0.122***	0.119***		0.120***	0.118***
		(4.179)	(4.069)		(3.769)	(3.695)
health		0.120***	0.119***		0.121***	0.121***
		(9.719)	(9.675)		(9.549)	(9.512)
work		0.004	0.006		0.001	0.004
		(0.207)	(0.296)		(0.063)	(0.176)
income (in logarithm)		0.031***	0.029***		0.032***	0.030***
		(5.870)	(5.452)		(6.114)	(5.724)
PERGDP (in logarithm)			0.071**			0.079**
			(2.152)			(2.316)
population density			0.001			-0.006
			(0.098)			(-0.539)
Log pseudo likelihood	-35596	-23569	-23566	-35056	-23046	-23043
Wald chi2	957.236	724.186	729.414	985.838	744.010	749.154
N	32,101	21,315	21,315	31,671	20,901	20,901