Secondly, factors associated with the IMR were analyzed by using path analysis and Panel Data model, and influential patterns of IMR in different regions including developed and lessdeveloped areas and urban and rural areas were analyzed and discussed.

• 把通径图思想与Panel Data模型结合对提取出的因子进行分析，对区域和城乡婴儿死亡率的影响模式进行探讨。