写以下文章的前言简介及分析结论。.doc

写以下文章的前言，简介及分析结论。 字数：至少1000字以上 语言：英语 截止时间：2012年6月3日 I.Per Capita Income Gap As mentioned above, data from the Penn World Table are used in calculating the income gap. The Penn World Table calculates the real GDP per capita of various countries in international dollars(I$) using 2005 as the base year. According to this analysis, the 1990 per capita income of China resembles the 1963 per capita income of Korea most. Therefore, there was a 27-year gap in terms of per capita income as of 1990. This income gap has been narrowed ever since. As of 2007, there was a 21-year gap between the income levels of the two countries, as shown in Table 1. In estimating and comparing income levels across countries and years, statistical error can arise due to inaccurate growth rate estimates and purchasing power disparities. Therefore, it is more important to find out the general trend of estimation rather to take the estimated numbers seriously. Table 1 Real GDP per capita of China and Korea (unit: I$, 2005 constant prices) China* Korea Time Gap(Years) 1990 1,924 1963 1,926 27 1995 3,072 1970 3,030 25 2000 4,400 1976 4,436 24 2005 6,483 1983 6,520 22 2007 7,868 1986 8,093 21 Note: * China Version 2 data are used. This is based on recent modifications of the official growth rate. Source: Alan Heston, Robert Summers and Bettina Aten, Penn World Table Version 6.3, Center for International Comparisons of Production, Income and Prices at the University of Pennsylvania, August 2009. (/). In order to verify the above estimation, let us estimate the income gap using data from the IMF. IMF publishes time series data of GDP per capita at current and constant prices as well as purchasing power parity(ppp) conversion rate of each country from 1980. Using these database, we can estimate the income gap between China and Korea. First, we can convert the Chinese GDP per capita at current price in yuan into Korean won using ppp conversion rates of two countries. For example, the Chinese GD