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Eating to save the planet: Evidence from a randomized controlled trial using individual-level food purchase data


  • Jalil, Andrew J.
  • Tasoff, Joshua
  • Bustamante, Arturo Vargas


Meat consumption is a major driver of climate change. Interventions that reduce meat consumption may improve public health and promote environmental sustainability. We conducted a randomized controlled trial to examine the effects of an awareness-raising intervention on meat consumption. We randomized undergraduate classes into treatment and control groups. Treatment groups received a 50-minute lecture on how food choices affect climate change, along with information about the health benefits of reduced meat consumption. Control classrooms received a lecture on a placebo topic. We analyzed 49,301 students’ meal purchases in the college dining halls before and after the intervention. We merged food purchase data with survey data to study heterogenous treatment effects and disentangle mechanisms. Participants in the treatment group reduced their purchases of meat and increased their purchases of plant-based alternatives after the intervention. The probability of purchasing a meat-based meal fell by 4.6 percentage points (p < 0.01), whereas the probability of purchasing a plant-based meal increased by 4.2 percentage points (p = 0.04). While the effects were stronger during the semester of the intervention, dietary shifts persisted and remained statistically significant through the full academic year. Our study provides evidence that an intervention based on informing consumers and encouraging voluntary shifts can effectively reduce the demand for meat. Our findings help to inform the international food policy debate on how to counter rising global levels of meat consumption to achieve climate change goals. To our knowledge, our study is the first to assess the effectiveness of an educational intervention to reduce meat consumption using such high-quality data (i.e. individual-level food purchases) over a prolonged period.

Suggested Citation

  • Jalil, Andrew J. & Tasoff, Joshua & Bustamante, Arturo Vargas, 2020. "Eating to save the planet: Evidence from a randomized controlled trial using individual-level food purchase data," Food Policy, Elsevier, vol. 95(C).
  • Handle: RePEc:eee:jfpoli:v:95:y:2020:i:c:s0306919220301548
    DOI: 10.1016/j.foodpol.2020.101950

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    References listed on IDEAS

    1. James G. MacKinnon & Matthew D. Webb, 2018. "The wild bootstrap for few (treated) clusters," Econometrics Journal, Royal Economic Society, vol. 21(2), pages 114-135, June.
    2. Farrow, Katherine & Grolleau, Gilles & Ibanez, Lisette, 2017. "Social Norms and Pro-environmental Behavior: A Review of the Evidence," Ecological Economics, Elsevier, vol. 140(C), pages 1-13.
    3. Timothy G. Conley & Christopher R. Taber, 2011. "Inference with "Difference in Differences" with a Small Number of Policy Changes," The Review of Economics and Statistics, MIT Press, vol. 93(1), pages 113-125, February.
    4. Richard H. Thaler & Cass R. Sunstein, 2003. "Libertarian Paternalism," American Economic Review, American Economic Association, vol. 93(2), pages 175-179, May.
    5. Esther Duflo & Emmanuel Saez, 2003. "The Role of Information and Social Interactions in Retirement Plan Decisions: Evidence from a Randomized Experiment," The Quarterly Journal of Economics, Oxford University Press, vol. 118(3), pages 815-842.
    6. James G. MacKinnon & Matthew D. Webb, 2018. "The wild bootstrap for few (treated) clusters," Econometrics Journal, Royal Economic Society, vol. 21(2), pages 114-135, June.
    7. Jacob Goldin & Ithai Z. Lurie & Janet McCubbin, 2019. "Health Insurance and Mortality: Experimental Evidence from Taxpayer Outreach," NBER Working Papers 26533, National Bureau of Economic Research, Inc.
    8. Brigitte C. Madrian, 2014. "Applying Insights from Behavioral Economics to Policy Design," Annual Review of Economics, Annual Reviews, vol. 6(1), pages 663-688, August.
    9. David Roodman & James G. MacKinnon & Morten Ørregaard Nielsen & Matthew D. Webb, 2019. "Fast and wild: Bootstrap inference in Stata using boottest," Stata Journal, StataCorp LP, vol. 19(1), pages 4-60, March.
    10. James G. MacKinnon & Matthew D. Webb, 2017. "Wild Bootstrap Inference for Wildly Different Cluster Sizes," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 32(2), pages 233-254, March.
    11. Pascaline Dupas, 2011. "Do Teenagers Respond to HIV Risk Information? Evidence from a Field Experiment in Kenya," American Economic Journal: Applied Economics, American Economic Association, vol. 3(1), pages 1-34, January.
    12. Schubert, Christian, 2017. "Green nudges: Do they work? Are they ethical?," Ecological Economics, Elsevier, vol. 132(C), pages 329-342.
    13. Cass R. Sunstein & Richard H. Thaler, 2003. "Libertarian paternalism is not an oxymoron," Conference Series ; [Proceedings], Federal Reserve Bank of Boston, vol. 48(Jun).
    14. Eric P. Bettinger & Bridget Terry Long & Philip Oreopoulos & Lisa Sanbonmatsu, 2009. "The Role of Simplification and Information in College Decisions: Results from the H&R Block FAFSA Experiment," NBER Working Papers 15361, National Bureau of Economic Research, Inc.
    15. James G. MacKinnon & Matthew D. Webb, 2019. "Wild Bootstrap Randomization Inference for Few Treated Clusters," Advances in Econometrics, in: Kim P. Huynh & David T. Jacho-chávez & Gautam Tripathi (ed.), The Econometrics of Complex Survey Data, volume 39, pages 61-85, Emerald Publishing Ltd.
    16. Hunter, Erik & Röös, Elin, 2016. "Fear of climate change consequences and predictors of intentions to alter meat consumption," Food Policy, Elsevier, vol. 62(C), pages 151-160.
    17. Robert Jensen, 2010. "The (Perceived) Returns to Education and the Demand for Schooling," The Quarterly Journal of Economics, Oxford University Press, vol. 125(2), pages 515-548.
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    1. Isabel Miguel & Arnaldo Coelho & Cristela Maia Bairrada, 2020. "Modelling Attitude towards Consumption of Vegan Products," Sustainability, MDPI, Open Access Journal, vol. 13(1), pages 1-17, December.

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