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Liability insurance premium income is not only an important source of insurance company profits, but also an important aspect used to evaluate the development level of the insurance industry. Therefore, it has important practical significance for accurate prediction. This paper uses improved GM (1,1) to predict the premium income of liability insurance in Shandong Province, and the results show that the fitting effect is very good.

Liability insurance premium income forecast based on improved GM (1,1) - A case of Shandong Province