* p < 0.1; *** p < 0.001
For the government intervention to sustainability performance path, the difference in chi-square is 5.6 (p < 0. 10). Similarly, for the collaborative operation to sustainability performance path, the difference in chi-square is 3.8 (p <0. 10). Thus the differences in these relationships between medium and small firm samples are not statistically significant. However, the difference in chi-square is 23.2 (p < 0. 001) for the sustainability performance-to-business performance path. These results suggest a significant difference in the relationship between sustainability performance and business performance and confirm our hypothesis 4 that company size has a moderating effect on the relationship between Sustainability Performance and Business Performance.