第三产业与经济发展有密切的关系，根据世界银行１３０多个国家及中国历史和横截面数据分析，国内生产总值与第三产业国内生产总值比重之间有形为 ＤＳＣＹ＝ａ ｘ ＲＪＧＤＰ的非线性关系（ＤＳＣＹ表示第三产业，ＲＪＧＤＰ表示人均国内生产总值）。用１９９５年中国横截面数 The tertiary industry is closely related to economic development. According to the historical and cross-sectional data from more than 130 countries in the World Bank and China, the tangible between the GDP and the tertiary industry’s GDP is DSCY = a x RJGDP Non-linearity (DSCY stands for tertiary industry, RJGDP stands for GDP per capita). With 1995 China cross-section number