“…Discussion of these relations can be found in Anderson (1951), Izenman (1975), Tso (1981), Davies and Tso (1982), and Reinsel and Velu (1998). Reduced rank models with stationary variables have been analyzed by Velu, Reinsel, and Wichern (1986) and Velu and Reinsel (1987), Gudmundsson (1977) applied reduced rank regression to select linear combinations that best described the average variation in a vector of dependent variables. RRR is also used in the analysis of cointegrated variables.…”