The effect of a soft-drink tax in Mexico: a time series approach

We use a time series approach and industry data to estimate the effect on consumption of an excise tax on soft drinks imposed recently in Mexico. The tax caused a price increase of 12.8% and reduced per-capita consumption about 3.8%. This effect is small in comparison to the effects suggested by most studies that have estimated price elasticities using an almost-ideal-demand-system and household survey data.