We consider the extent to which long-horizon survey forecasts of consumption, investment and output growth are consistent with theory-based steady-state values, and whether imposing these restrictions on long-horizon forecasts will enhance their accuracy. The restrictions that we impose are consistent with a two-sector model in which the variables grow at different rates in steady state. The restrictions are imposed by an exponential-tilting of simple auxiliary forecast densities. We show that imposing the consumption–output restriction yields modest improvements in the long-horizon output growth forecasts, and larger improvements in the forecasts of the cointegrating combination of consumption and output: the transformation of the data on which accuracy is assessed plays an important role.
Clements, M. P. (2015). 'Long-run restrictions and survey forecasts of output, consumption and investment', International Journal of Forecasting, 32(3), 614-628.