《Table 7 Robustness test of the relationship between customer concentra-tion and agricultural enterp

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《"Strategic Deviance,Customer Concentration and Enterprise Value——A Case Study of Agricultural Listed Enterprises"》

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As there are two measurement methods of customer concentration，the previous section has adopted customer concentration（cc），namely the proportion of the top five customers'operating income to the total operating income for regression.In order to make the conclusion of the study more robust，the Herfindahl index（hhi）of the sales proportion of the top five customers is used to test the robustness.The results of the robustness tests are shown in Table 6 and Table 7.