
Lenny D. answered 05/30/20
Former professor of economics at Tufts University
It sure looks like ARMA(1,1) to me Yt-aYt-1 = et+ret-1 -ut
AR(1) MA(1)
The model is yt = αyt-1 + et, where et =ρet-1 + ut and ut is white noise. What type of AR/MA process is this? I think its AR(2) but I am not sure...
Lenny D. answered 05/30/20
Former professor of economics at Tufts University
It sure looks like ARMA(1,1) to me Yt-aYt-1 = et+ret-1 -ut
AR(1) MA(1)
Tom K. answered 05/28/20
Knowledgeable and Friendly Math and Statistics Tutor
It would be ARMA(1, 1). See http://www.maths.qmul.ac.uk/~bb/TimeSeries/TS_Chapter4_6.pdf
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