In Chapter 10, chunk 38 and 40, the function 'recursive_forecast' is utilized as opposed to 'rolling_forecast'.
The 'rolling_forecast' function is structured to accept a singular dataframe as an input, internally segregating 'realdpi' and 'realcons' within the function's operation.
Conversely, the 'recursive_forecast' function requires two separate inputs: 'endog' and 'exog'. This function configuration is outlined and utilized in Chapter 9.