Threshold variable | Core explanatory variable | Strength of threshold | Coefficient of estimate | standard deviation | t-value | p-value |
EI4 | EI2 | EI4 < 0.766 | −0.028 | 0.014 | −2.06 | 0.039 |
0.766 < EI4 < 1.019 | −0.007 | 0.014 | −0.48 | 0.634 | ||
EI4 > 1.019 | 0.043 | 0.018 | 2.45 | 0.015 | ||
EI6 | EI4 < 0.766 | 0.008 | 0.023 | 0.35 | 0.727 | |
0.766 < EI4 < 1.019 | 0.041 | 0.022 | 1.89 | 0.058 | ||
EI4 > 1.019 | 0.130 | 0.028 | 4.58 | 0.000 |