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. 2022 Sep 20;2(2):qoac025. doi: 10.1093/qopen/qoac025

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© The Author(s) 2022. Published by Oxford University in association with European Agricultural and Applied Economics Publications Foundation.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — Event study estimates on all noodle purchases (in grams) across buyer groups. Note: This figure shows the event study estimates and the 95 per cent confidence interval from estimation of Equation 1 with inverse propensity weighting on all noodle purchases. Standarad errors clustered at household level. Buyer groups are defined based on the number of months they purchased Maggi noodles during the 24 months prior to May 2015: 24 months for Monthly buyer; 13–23 months for Frequent buyer; 1–12 months for Infrequent buyer. Comparsion households are those who did not buy any Maggi noodles 2 years prior to May 2015. Dotted lines indicate the scandal period from May 2015 to November 2015.