Introducing taxes, subsidies or both: The effects of various food pricing strategies in a web-based supermarket randomized trial

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• 作者：Wilma E. Waterlander^a ; ^d ; ^{wilma.waterlander@vu.nl} ; Ingrid H.M. Steenhuis^a ; ^d ; ^{ingrid.steenhuis@vu.nl} ; Michiel R. de Boer^a ; ^b ; ^d ; ^{m.r.de.boer@vu.nl} ; Albertine J. Schuit^a ; ^c ; ^d ; ^{jantine.schuit@rivm.nl} ; Jacob C. Seidell^a ; ^d ; ^{j.c.seidell@vu.nl}
• 关键词：Nutrition policy ; Intervention studies ; Randomized controlled trial ; Food ; Financial support ; Health policy ; Health behavior ; Taxes ; Economics
• 刊名：Preventive Medicine
• 出版年：2012
• 期刊代码：306_00917435
• 类别：med
• 出版时间：1 May, 2012
• 卷：54
• 期：5
• 页码：323-330
• 文件大小：788 K

摘要

ass="h4">Objective

Fiscal policies may form a solution in improving dietary intake. This study aimed to examine the effectiveness of varying taxing and subsiding schemes to stimulate healthier food purchases.

ass="h4">Methods

A randomized controlled trial with three levels of price reduction on healthy foods (no; 25%; 50%) 脳 three levels of price increase on unhealthy foods (5%; 10%; 25%) factorial design was used. 150 participants were randomized into one of nine conditions and were asked to purchase groceries at a web-based supermarket. Data were collected in the Netherlands in January-February 2010 and analyzed using analysis of covariance.

ass="h4">Results

Subjects receiving 50%discount purchased significantly more healthy foods than subjects receiving no (mean difference = 6.62 items, p < 0.01) or 25%discount (mean difference = 4.87 items, p < 0.05). Moreover, these subjects purchased more vegetables (mean difference = 821 g; p < 0.05 compared to no discount). However, participants with the highest discount also purchased significantly more calories. No significant effects of the price increases on unhealthy foods were found.

ass="h4">Conclusion

Price decreases are effective in stimulating healthy food purchases, but the proportion of healthy foods remains unaffected. Price increases up to 25%on unhealthier products do not significantly affect food purchases. Future studies are important to validate these results in real supermarkets and across different countries.