A new model to improve credit rating under incidence relation

It is well known that credit rating for corporations is very important to the development and stability of financial market. The current rating methods always just pay attention to the information of rated aim. Here the paper offers a novel idea to improve the quality of credit rating with consideration to incidence relation among corporations. In addition, when the credit level of one corporation changes sharply, our model can quantize its influence to others also on the net. Furthermore, we get some reasonable results through an experiment on a practical sample.