Given the frequent misuse of methods based on linear models with Gaussian i.i.d. distributed errors, Cogger (1988) argued that new developments in the area of drobustT statistical methods should receive more attention within the time series forecasting community. A robust procedure is expected to work well when there are outliers or location shifts in the data that are hard to detect. Robust statistics can be based on both parametric and nonparametric methods. An example of the latter is the Koenker and Bassett (1978) concept of regression quantiles investigated by
Cogger. In forecasting, these can be applied as univariate and multivariate conditional quantiles. One important area of application is in estimating risk management tools such as value-at-risk. Recently, Engle and Manganelli (2004) made a start in this direction, proposing a conditional value at risk model. We expect to see much future research in this area.