> [Does one] comparison shop at different supermarkets to figure out what the highest quality food is for the lowest price? No, of course not. That's what the

> [Does one] comparison shop at different supermarkets to figure out what the highest quality food is for the lowest price? No, of course not. That's what the weekly newspaper flyers are for. On the other hand if one is relatively well off, then the strategy you propose of picking a store that seems like an overall good value and sticking to it may make more sense than spending valuable time poring over grocery store flyers and making trips to multiple stores. This difference in behavior (combined with coupon clipping) is pretty much the quintessential example of how retailers can implement price discrimination - i.e. charging higher prices to those with a greater income or greater willingness to spend.