Table 1. Meta-analysis of Outcomes Following SSB Taxes.
Outcome | No. | 3-Level random-effects model | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Estimates | Articles | Tax policies | Pooled estimate (95% CI) | P value | Prediction interval | Q for heterogeneity | P value | Heterogeneity I2 (95% CI), | Publication bias | |
Price: tax pass-through, % | 46 | 41 | 18 | 82.2 (66.2 to 98.3) | <.001 | 8.6 to 155.9 | 5635 | <.001 | 99.2 (99.1 to 99.3) | None |
SSB sales: % demand change | 35 | 33 | 16 | −14.6 (−20.4 to −8.8) | <.001 | −37.6 to 8.4 | 709 742 | <.001 | 100 (NA) | None |
SSB sales: price elasticity | 35 | 33 | 16 | −1.59 (−2.11 to −1.08) | <.001 | −3.94 to 0.75 | 122 929 | <.001 | 100 (NA) | None |
Sales, substitution beverages: cross-price elasticity | 25 | 24 | 14 | 0.42 (−0.52 to 1.35) | .37 | −3.69 to 4.52 | 1056 | <.001 | 97.7 (97.3 to 98.1) | Yes |
SSB consumption: % demand change | 12 | 9 | 5 | −18.1 (−37.6 to 1.5) | .07 | −60.8 to 24.6 | 23 | .02 | 52.9 (9.4 to 75.6) | Yes |
SSB consumption: price elasticity | 12 | 9 | 5 | −3.78 (−8.86 to 1.30) | .13 | −15.78 to 8.22 | 60 | <.001 | 81.6 (68.9 to 89.1) | None |
Consumptionof substitution beverages: cross-price elasticity | 12 | 9 | 5 | 0.54 (−0.60 to 1.68) | .32 | −1.70 to 2.79 | 21 | .03 | 47.6 (0 to 73.1) | None |
Abbreviations: NA, not applicable; SSB, sugar-sweetened beverages.