Specifications include, but are not limited to: provide a set of econometric time series equations to forecast the largest revenue streams that fund the State of Oklahoma’s General Revenue Fund. These forecasts will be for the State of Oklahoma’s current and upcoming fiscal years. For the first year of the contract period, the forecasts will be for the current fiscal year and the upcoming four fiscal years. These forecasted revenue sources (which will be the dependent variables in these equations) are as follows: a. Net individual income tax collections b. Apportioned corporate income tax collections c. Apportioned state sales tax collections d. Apportioned state use tax collections e. Gross motor vehicle taxes collections