There is a significant positive linear correlation between the Herfindahl-Hirschman Index and the auditing fees.
赫芬因德指数与审计费用显著正相关；
2
Based on the theory of Industry Organization, the paper uses the Concentrative Ratio, Herfindahl-Hirschman Index, Lorenz Curve and Gini Coefficient to analyze AMM's concentrative degree.