Institutional environment | Number of observations | Mean | median | Mean difference | T-value | Median difference | Z value |
Low-level of social integrity | 4392 | 8.97% | 8.26% | 0.47% | 4.728 *** | 0.03% | 2.255 ** |
High-level of social integrity | 4391 | 8.50% | 8.23% |