Table 7 Estimation of stochastic production frontier.
Variable | Parameter | Coefficient | Standard error |
|---|---|---|---|
Constant | β0 | 13.17* | 5.77E−06 |
\({B}_{it}\) (berth length) | β1 | − 0.0622* | 0.0000188 |
\({A}_{it}\) (area of port) | β2 | 0.0621* | 3.24E−06 |
\({C}_{it}\) (cranes) | β3 | 0.2719* | 3.29E−06 |
\({Q}_{it}\) (number of berths) | β4 | 0.0148* | 2.62E−04 |