We designed an online grocery store to study household
shopping behavior for a period of 5 weeks between September
11 and October 13, 2006. The shopping environment was as
close as possible to any functioning store, and all price change
conditions were controlled within the range of outside store
price changes. In our online store, shoppers made actual
purchases by spending real money. We collected detailed
information about the participants’ plans for purchases, price
expectations, and purchase behaviors