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Mean Star Rating per Product Purchased by Supermarket Banner, June 1, 2012, to July 30, 2013
The first vertical line marks the introduction of Guiding Stars in the intervention supermarket banner in August 2012, and the second vertical line marks its introduction in the control supermarket banners in March 2013. The averages are taken after aggregating at the store‐day level. [Color figure can be viewed at wileyonlinelibrary.com]
