And welcome to the show from here in the German capital. We begin, though, in the French capital where there's a real battle for the consumer going on between some of the exclusive shops there. This is, of course, good news for the shopper and indeed in this case it's proving to be good for the soul as well. This is because top boutiques and department stores in Paris are discovering art as a marketing tool. We've been to see if art encourages the customer to spend, spend, spend.