Changes in sugar-sweetened beverage purchases across the price distribution after the implementation of a tax in Mexico: a before-and-after analysis

Table 2 Sugar-sweetened beverage purchase changes before and after the tax was implemented, by price tertile

Tertiles of prices	Low price				Middle price				High price
	Model 1		Model 2		Model 1		Model 2		Model 1		Model 2
	Coefficient	SE	Coefficient	SE	Coefficient	SE	Coefficient	SE	Coefficient	SE	Coefficient	SE
Post-tax (2014–15)	1.77	2.85	1.82	2.99	-13.79***	2.73	-10.80***	2.65	0.11	0.57	0.21	0.56
Quarter 2	10.08***	1.86	10.09***	1.88	5.45***	1.65	7.25***	1.66	2.10***	0.39	2.08***	0.39
Quarter 3	13.86***	2.11	13.90***	2.16	4.20*	2.07	5.60**	2.03	2.06***	0.39	2.17***	0.39
Quarter 4	13.58***	2.05	13.60***	2.11	-4.28*	2.01	-0.69	2.13	0.99**	0.36	1.08**	0.35
Month(trend)	-0.71**	0.23	-0.71**	0.23	0.06	0.19	-0.42	0.23	-0.17***	0.04	-0.16***	0.04
Squared month (trend)	0.00	0.00	0.00	0.00	-0.00	0.00	0.00	0.00	-0.00	0.00	-0.00	0.00
Per capita monthly income	0.02**	0.01	0.02**	0.01	-0.03***	0.01	-0.03***	0.01	-0.00	0.00	-0.00	0.00
Unemployment rate	0.04	1.37	0.05	1.37	-3.07*	1.29	-2.64*	1.27	-0.71**	0.23	-0.74**	0.23
Monthly % products package > 1 L			0.04	0.73			1.92***	0.41			0.14	0.09
Number of observations	2592				2592				2592

Population-weighted estimates and robust standard errors in parentheses. Coefficients correspond to the marginal change in SSB purchases in ml/capita/day for the variable of interest. Models include city-fixed effects. Source: Authors’ own analyses and calculations based on data from Nielsen through its Mexico Consumer Panel Service (CPS) for the food and beverage categories for January 2012 – December 2015. The Nielsen Company, 2016. The conclusions drawn from the Nielsen data are those of UNC and do not reflect the views of Nielsen. Nielsen is not responsible for and had no role in, and was not involved in, analyzing and preparing the results reported herein
SE, standard error
^* p < 0.05
^** p < 0.01
^*** p < 0.001

ISSN: 1471-2458