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. 2013 Sep 24;8(9):e75070. doi: 10.1371/journal.pone.0075070

Table 1. Studies of interventions to promote diet.

Intervention category Subsidiary intervention type Primary studies (n) Reviews (n)
Price promotions (n=34) Simple discounts - price restructuring in discrete settings 13 17
Multi-buy deals 2 1
Price-pack deals 0 1
Price deals 0 0
Introductory pricing 0 0
Couponing 1 1
Rebates 0 0
Taxes (n=56) Agricultural commodity tax 0 0
Fat tax 8 5
Snack tax 5 7
Calorie tax 9 11
Soft drinks tax 18 12
Sugar tax 3 2
Tax exemptions 3 1
Supply-side subsidies (n=47) Agricultural commodities 0 3
Agricultural commodities – subsidy removal 1 2
School meals 20 4
Other meals 1 0
Healthy foods 9 7
Healthy non-alcoholic beverages 3 6
Specific nutrients 3 1
Food transportation or delivery 1 1
Direct unit pricing legislation (n=0) Minimum pricing legislation 0 0
Maximum pricing legislation 0 0
Transfer payments (n=80) Restricted income transfers, welfare benefits or welfare assistance programs 62 16
Unrestricted income transfers, welfare benefits or welfare assistance programs 3 1
Tax credits 0 0