Do High vs. Low Purchasers Respond Differently to a Nonessential Energy-Dense Food Tax? Two-Year Evaluation of Mexico's 8% Nonessential Food Tax

Taillie, Lindsey Smith; Rivera, Juan A.; Popkin, Barry M.; & Batis, Carolina. (2017). Do High vs. Low Purchasers Respond Differently to a Nonessential Energy-Dense Food Tax? Two-Year Evaluation of Mexico's 8% Nonessential Food Tax. Preventive Medicine, 105(Suppl.), S37-42.

Taillie, Lindsey Smith; Rivera, Juan A.; Popkin, Barry M.; & Batis, Carolina. (2017). Do High vs. Low Purchasers Respond Differently to a Nonessential Energy-Dense Food Tax? Two-Year Evaluation of Mexico's 8% Nonessential Food Tax. Preventive Medicine, 105(Suppl.), S37-42.

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It is unclear whether response to a nonessential food tax varies across time or for high vs. low-consuming households. The objective is to examine whether the effect of Mexico's 2014 8% nonessential energy-dense foods tax increased in the second year post-implementation and whether it differentially affected households by pre-tax purchasing pattern. We used longitudinal data on Mexican household food purchases (n = 6089 households) from 2012 to 2015. Households were classified based on median pre-tax purchases: low untaxed/low taxed (“low”), low untaxed/high taxed (“unhealthy”), high untaxed/low taxed (“healthy”), and high untaxed/high taxed (“high”) purchasers. Fixed effects models tested whether observed post-tax purchases differed from the counterfactual, or what would have been expected based on pre-tax trends. Post-tax declines in the % taxed food purchases increased from − 4.8% in year one to − 7.4% in year two, yielding a 2-year mean decline of 6.0% beyond the counterfactual (p < 0.01). Post-tax change in % taxed food purchases varied by pre-tax purchasing level. Healthy purchasers showed no post-tax change in % taxed food purchases beyond the counterfactual, while unhealthy, low and high purchasers decreased (− 12.3%, − 5.3% and − 4.4%, respectively) (p < 0.01). The positive effect of Mexico's junk food tax continued in the second year, and households with greater preferences for taxed foods showed a larger decline in taxed food purchases.




JOUR



Taillie, Lindsey Smith
Rivera, Juan A.
Popkin, Barry M.
Batis, Carolina



2017


Preventive Medicine

105

Suppl.

S37-42










10434

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