The TrendSpecificationType enumeration is used to determine specifications of trend in main and secondary regressions.
It is used by the following properties:
| Value | Brief description | |
| 0 | NoneNone. Without constant in the main and the secondary regressions. | |
| 1 | NoneConst. Without constant in the main and with constant in the secondary regressions. | |
| 2 | NoneLinear. Without constant in the main and with linear trend in the secondary regressions. | |
| 3 | NoneQuadratic. Without constant in the main and with quadratic trend in the secondary regression. | |
| 4 | ConstNone. With constant in the main and without constant in the secondary regressions. | |
| 5 | ConstLinear. With constant in the main and with linear trend in the secondary regressions. | |
| 6 | ConstQuadratic. With constant in the main and with quadratic trend in the secondary regressions. | |
| 7 | LinearNone. Linear trend in the main and without constant in the secondary regressions. | |
| 8 | LinearQuadratic. Linear trend in the main and quadratic trend in the secondary regressions. | |
| 9 | QuadraticNone. Quadratic trend in the main and without constant in the secondary regression. |
See also: