The co - intergration theory was applied to analyse the relationship between urbanization and the dev-eiopred of public transportation based on the data from 1978 to 2010 of Beijing, so as to seek the relation between seek short - term alynamic fluctuation and long - term equilibrium. Unit root tests, Granger causality test, co - integration test, impulse response function quantitative were used to analysis the intrinsic links between the development of urbanization and public transport. The result shows that there exists the co - integration relationship between the development of urbanization and public transport, that is to say , there exists the long - term stable equilibrium relationship between them. The development of public transport is the Granger cause of urbanization , and changes in public transport development will cause fluctuations in the same direction of urbanization.%基于1978-2010年北京市城市化水平与公交发展的数据,应用协整理论对城市化与公交发展的关系进行实证分析,寻求两者之间的短期动态波动和长期均衡关系.运用单位根检验、Granger因果关系检验、协整关系检验、脉冲响应函数等方法定量研究分析了城市化与公交发展两者之间的内在联系.结果表明:城市化与公交发展两者存在协整关系,即它们之间有长期稳定均衡关系；公交发展是城市化的Granger原因,公交发展的变化将引起城市化的同向波动.
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