... Iceland, Ireland, Italy, Japan, Korea, Luxembourg, Mexico, the Netherlands, New Zealand, Norway, Poland, Portugal, the Slovak Republic, Spain, Sweden, Switzerland, Turkey, the United Kingdom and ... interest comes up, by providing means for the buyer to assess the quality or the aspect of the good, the reputation of the sellers, and by providing guarantees to trade safely. There are often ... for the iPhone who increase the value or functionality of the network), and charge the side whose demand increases most in response to growth on the other side. Which market represents the...