The papers in this special issue of Mathematics and Computers in Simulation cover the following topics: improving judgmental adjustment of model-based forecasts, whether forecast updates are progressive, on a constrained mixture vector autoregressive model, whether all estimators are born equal:...

This paper proposes a unified framework to analyse the theoretical properties of forecast combination. The proposed framework not only is useful for deriving all existing results with ease but also provides important insights into two unresolved puzzles of forecast combination. Specifically,...