Shopping is a way of interacting with the world around us: "This means searching becomes a way for us to interact with the world around us, an experiental horizon where certain aspects loom large in the foreground while others are pushed into the background," he explains.
In particular, his research focuses on what is actually going on when we are "window shopping", i.e. strolling round and "just looking" at things without having a clear idea of what we are looking for. The people he has been studying search patiently for certain things, but more than anything, they are searching for the feeling of having found something that is better and finer that they could have imagined. At this point they have stretched the boundaries of what would be reasonable to expect to find.