OLS | MLE | |||||
Cost | Estimate | Std. Error | t value | Parameter | Std.err | t-value |
(Intercept) | 3.056 | 2.903 | 1.052 | 0.454 | 1.962 | 0.231 |
Ps/Pl | 4.073*** | 1.136 | 3.585 | 2.857*** | 0.809 | 3.533 |
Pf/Pl | −2.499** | 1.154 | −2.166 | −2.534*** | 0.902 | −2.810 |
Ph/Pl | 0.945 | 0.678 | 1.393 | 0.697 | 0.738 | 0.944 |
Pi/Pl | 0.602 | 0.694 | 0.868 | 1.436** | 0.654 | 2.197 |
Pp/Pl | −0.187 | 0.676 | −0.276 | −0.849 | 0.643 | −1.322 |
Q | 0.551* | 0.319 | 1.727 | 0.622** | 0.278 | 2.233 |
Ps/Pl * Ps/pl | 0.532* | 0.275 | 1.930 | 0.223 | 0.217 | 1.027 |
Ps/Pl * Pf/Pl | −0.042 | 0.212 | −0.197 | −0.086 | 0.211 | −0.407 |
Ps/Pl * Ph/Pl | 0.233* | 0.138 | 1.684 | 0.252* | 0.134 | 1.878 |
Ps/Pl * Pi/Pl | −0.066 | 0.143 | −0.460 | −0.126 | 0.117 | −1.074 |
Ps/Pl * Pp/Pl | 0.013 | 0.154 | 0.082 | 0.106 | 0.148 | 0.719 |
Ps/Pl * Q | −0.128** | 0.058 | −2.214 | −0.194*** | 0.057 | −3.375 |
Pf/Pl * Pf/Pl | −0.288 | 0.247 | −1.166 | −0.201 | 0.216 | −0.929 |
Pf/Pl * Ph/Pl | 0.014 | 0.163 | 0.088 | −0.103 | 0.173 | −0.596 |
Pf/Pl * Pi/Pl | 0.214 | 0.156 | 1.371 | 0.422*** | 0.155 | 2.727 |
Pf/Pl * Pp/Pl | −0.081 | 0.189 | −0.428 | −0.286 | 0.201 | −1.428 |
Pf/Pl * Q | 0.156** | 0.062 | 2.499 | 0.181*** | 0.054 | 3.389 |
Ph/Pl * Ph/Pl | −0.016 | 0.117 | −0.136 | 0.107 | 0.112 | 0.955 |
Ph/Pl * Pi/Pl | −0.068 | 0.089 | −0.767 | −0.023 | 0.084 | −0.272 |
Ph/Pl * Pp/Pl | 0.041 | 0.082 | 0.496 | 0.019 | 0.082 | 0.226 |
Ph/Pl * Q | 0.028 | 0.038 | 0.744 | 0.039 | 0.040 | 0.968 |
Pi/Pl * Pi/Pl | 0.045 | 0.104 | 0.437 | −0.017 | 0.099 | −0.171 |
Pi/Pl * Pp/Pl | −0.008 | 0.077 | −0.101 | 0.020 | 0.078 | 0.258 |