** p < 0.01; *** p < 0.001
The path coefficients from Government Intervention andCollaborative Operation to Sustainability Practices are similar across both the size categories. For Government Intervention positive results 0.39 for medium firms (p < 0.01) and 0.45 for small firms (p < 0.01) support our hypothesis 1. For Collaborative Operation positive path coefficients 0.61 for medium firms (p < 0.001) and 0.58 for small firms (p < 0.001) support our hypothesis 2. Again positive path coefficients from Sustainability Performance toBusiness Performance in both size groups support our hypothesis 3. But this result differs across the two samples. It was 0.82 (p < 0.001) for medium sized firms and was 0.21 (p < 0.001) for small sized firms.
Figure 2 : Structural Model to test the Proposed Empirical Relationship
An insignificant difference in chi-square between the constrained and unconstrained models suggests equal path coefficients across the two samples, whereas a significant difference in chi-square would imply that the path coefficient is statistically different between the two samples. The results are shown in Table VI.
Table VI: Results of Multi-group Comparisons