Table 5.

Multiple ITSA for Laspeyres Price Indices of high-in and reformulated products that DE households purchased

DE	High-in	Reformulated high-in	Reformulated not high-in
Control preintervention trend (${\mathrm{\beta }}_1$)	0.0041***	0.0040***	0.0041***
	(0.0004)†	(0.0005)	(0.0004)
Change in level control postintervention (${\mathrm{\beta }}_2$)	0.0124	0.0175	0.0119
	(0.0104)	(0.0142)	(0.0102)
Change in trend control postintervention (${\mathrm{\beta }}_3$)	−0.0012*	−0.0015	−0.0011
	(0.0007)	(0.0011)	(0.0007)
Preintervention difference in level between treated and control (${\mathrm{\beta }}_4$)	0.0098	0.0036	0.0152*
	(0.0088)	(0.0138)	(0.0089)
Preintervention difference in trend between treated and control (${\mathrm{\beta }}_5$)	−0.0007	−0.0002	−0.0008
	(0.0006)	(0.0009)	(0.0007)
Difference in change in level treated versus control postintervention (${\mathrm{\beta }}_6$)	0.0019	0.0167	−0.0126
	(0.0142)	(0.0279)	(0.0198)
Difference in change in trend treated versus control postintervention (${\mathrm{\beta }}_7$)	−0.0002	−0.0029	0.0018
	(0.0010)	(0.0023)	(0.0018)

*p<0.1, **p<0.05, ***p<0.01.

^†SEs are in parentheses.

ITSA, interrupted time series analysis.