No need for meat as most customers do not leave canteens on Veggie Days

Switching to a diet lower in red meat has the potential to reduce greenhouse gas emissions. Using a unique time series of daily sales data from three German university canteens from 2017 to 2019, we
analyse the effects of a monthly Veggie Day in a food-away-from-home context. We fi nd that the temporary ban on meat dishes did not lead to a widespread boycott – as the heated public debates
might have suggested. In our setting, a Veggie Day could reduce greenhouse gas emissions by up to 66%. However, especially at the site with a higher share of meat eaters on regular days, up to 22% of
customers bypassed the meat-free main dishes on Veggie Days and ate at other on-site alternatives where meat was available. However, total on-site sales did not decrease signi fi cantly. Students were
less likely to switch to alternatives than staff and guests. A less stringent implementation of a Veggie Day where only beef dishes were removed from the menu, did not result in a signi fi cant shift to
alternatives but could reduce emissions by up to 51%

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