Table 2 Regression Coefficients for Cost Mode
Table 2
Regression Coefficients for Cost Mode
| Description of the variable | Variable | Coef. | P > | t | |
|---|---|---|---|
| Cost of construction | (Eij) | — | — |
| Lane-kilometers of construction | In(Lij*ΔCij) | 0.50 | 0.00* |
| Dummy for new construction | N | 0.39 | 0.04* |
| Dummy for interstate roads | HI | 1.97 | 0.00* |
| Dummy for state roads | HS | 0.56 | 0.02* |
| Log of (year-1979) | ln(Y) | 0.75 | 0.00* |
| Log of period of construction | ln(P) | 0.16 | 0.06* |
| Distance from nearest downtown | X | –0.03 | 0.04* |
| Constant | 5.79 | 0.00* | |
| Number of observations: 76 | |||
| Adj. R2: 0.77 | |||
* Significant at 90% confidence interval.