economic
With the development of the economic, there are so many goods have been produced. Many producers produce new goods for earning more capital. Give some examples, net top, DVD and so on. Although they are not the new goods, they improve so quickly. Especially, the mobile phone becomes mare and more popular. In my own view, the mobile phone is so expensive in the old days. But now, the price is much cheaper than the old days and the new types of mobile phone are produced so quickly. Even some people change a mobile phone per month. In the following paragraphs, I would use my economic knowledge to explain and analyze the mobile phone market. In the 1990 of mobile phone market, a little people can own it. At that time, there is a little number of producers in China. The technology is not mature and the cost is very high.