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copy(c=litmana) A\series01 without rho and @indicator?

Posted: Thu Aug 06, 2026 1:16 pm
by paues
In the Command Reference under copy and Frequency Conversion Options, we learnt that we can write something like

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copy(c=litmana, rho=0.7) A\series01 @indicator Q\indseries
to copy a series using Litterman conversions. The documentation specifies that we must specify an indicator series but doesn't say what value is used for rho if one doesn't specify it oneself. But EViews doesn't throw an error if we simply write

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copy(c=litmana) A\series01
That is, without either an indicator series or a value for rho. But what happens in this latter case? I'm confused...

Re: copy(c=litmana) A\series01 without rho and @indicator?

Posted: Thu Aug 06, 2026 4:27 pm
by EViews Gareth
EViews will use an ML estimator to estimate rho, if it isn't supplied.
An indicator series of a constant value of 1 is used if none is supplied.

https://eviews.com/help/helpintro.html# ... 23ww268576