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Various macros, including arima(), hannriss(), innovest(),
neg2logLarma(), acfarma() and specarma(), allow for different sign
conventions in the definition of autoregression and moving average
coefficients.  This is controlled by keywords 'arsign' and 'masign'
and/or scalar variables ARSIGN and MASIGN, all with values -1 or +1.

See topic 'MASIGN' for details.

Gary Oehlert 2003-01-15