Wilshire                FRED data on the Wilshire 5000 index and other
                        economic factors
cumcount                Get cumulative count
durbinH                 Calculate Durbin's h-statistic
ecm                     Build an error correction model
ecmave                  Build an averaged error correction model
ecmaveback              Backwards selection using an averaged error
                        correction model
ecmback                 Backwards selection to build an error
                        correction model
ecmpredict              Predict using an ecm object
lagpad                  Lag a vector
lmave                   Build multiple lm models and average them
