Method | Duration | Place | Period | Sample | Customers |
---|---|---|---|---|---|
Purchasing data | - | 2 intervention stores and 2 control stores | January to June 2013 (baseline) and January to June 2014 (intervention) | 6625 customers | Member-customers only, making 100 % of their purchases in the same store, with at least one purchase during baseline and during intervention |
Exit surveys | 2 min | 2 intervention stores | May-June 2014 | 259 customers | All customers |
In-depth surveys | 15 min | 2 intervention stores | June 2014 | 116 customers | Member-customers only |