format
4 univariate time series M1
, GNP
, rs
, and
rl
and the joint series USeconomic
containing the
logarithm of M1
, the logarithm of GNP
, rs
, and
rl
.source
Luetkepohl, H. (1991):
Introduction to Multiple Time Series Analysis.
Springer Verlag, NY, 500--503.