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Urban basic old-age insurance is an important part of the social security system , and its comprehensive level of evaluation is not only the evaluation of urban basic old-age insurance system for key health indicators , and also the evaluation of the Social Security System is an important indicator . After 20 years of continuous reform and development of China 's urban basic old-age insurance , has basically built up a complete set of the institutional framework , and uniform implementation nationwide . But China has a vast territory , the political, economic , social and cultural role of various factors , making around the development process and the level of gravity of different . The current level of urban basic old-age insurance quantitative studies are rare , but also did not establish a scientific , sound evaluation index system , in particular, very few empirical studies on regional differences in China 's urban basic old-age insurance level . This paper argues that the assessment of a country or a region urban basic old-age insurance status , and only consider their level of spending is not comprehensive , it is necessary to conduct a comprehensive evaluation of urban basic old-age insurance level . First, try to extract the key indicators of economic support factors , demographic factors , institutional policy factors , dynamic development factors in four areas , to build a set of urban basic old-age insurance level evaluation system . Secondly , on this basis , select the relevant data in the China Statistical Yearbook , comprehensive level of China 's 31 provinces, urban basic old-age insurance , the actual calculations using SPSS13.0 in principal component analysis , and press the four the principal component -depth comparison of the differences , the following conclusions : the overall level of urban basic old-age insurance is relatively low , and indeed there are significant regional differences ; extremely close relationship with the level of economic development , despite is not entirely consistent . Therefore, the top surface of most of the eastern region , and at the back of most of the central and western regions . Again , to explore the main reason for the formation of different depth analysis from around the economic support , population structure and system building . Finally , this three suggestions to promote the coordinated development of urban basic old-age insurance .
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