Re: st: convert yearly data into monthly and interpolate

[D-Ta <altruist81@gmx.de>]

I would still call it interpolation (to me, imputation is related to the 
filling of missing values for some units only). But I guess my point is 
clear anyway.

Moreover, seasonality patterns are not of importance for my approach, I 
really just want to know how to convert it to monthly format and 
interpolate over all month - preferably in a efficient way (!)



Am 19.04.2011 10:23, schrieb Nick Cox:
> This is reminiscent of a question asked recently by Ben Ammar. See the
> thread starting with
>
> http://www.stata.com/statalist/archive/2011-04/msg00131.html
>
> Perhaps terminology, or at least its use, varies between fields, but
> your problem strikes me as one of imputation, not interpolation.  Any
> way, it appears that there are various different ways to fudge this.
> Which do you want? How do you propose to re-insert any seasonality
> that has been lost?
>
> Nick
>
> On Tue, Apr 19, 2011 at 8:55 AM, D-Ta<altruist81@gmx.de>  wrote:
> > Dear List Users,
> >
> > I have the following yearly data.
> >
> > id      Label   alq2_2000       alq2_2001       alq2_2002
> > 1       group1  19,3            19,8            18,2
> > 2       group2  19,3            19,8            18,2
> > 3       group3  30,1            24,5            22,9
> >
> >
> > the alq2_year variables measure group specific unemployment in a given year.
> > I would like to merge it with another data set which consists of monthly
> > data. Before converting my yearly data into a monthly format, I would like
> > to interpolate it such that i get monthly interpolated estimates of alq2. i
> > would appreciate if someone could help.
>
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