# Re: [OPE-L] Teaching Tautologies : dynamic or static?

From: dlaibman@JJAY.CUNY.EDU
Date: Wed Mar 16 2005 - 09:42:16 EST

```HI Anders -- and everyone,
The paper will appear in the *Eastern Economic Journal*, but their last prediction of a date was Winter 2006!  (By then the capital stock will certainly have grown!!  :-)  )
As I mentioned earlier, I can't transmit the diagrams electronically.  Again, I would be glad to get some *real* help with this problem.  I have a scanner.  But I am a novice in this area.  If anyone wants to help, write to me off-list, and give me operational instructions; not just "scan it into a xxxx file," etc.
In the meantime, I will send hard copies of the paper to anyone who provides an old-fashioned snail-mail address.
All best,
David

----- Original Message -----
From: Anders Ekeland <anders.ekeland@ONLINE.NO>
Date: Tuesday, March 15, 2005 3:05 pm
Subject: Re: [OPE-L] Teaching  Tautologies : dynamic or static?

> Hi Jerry,
>
> Very difficult to discuss a paper/model I have not seen, and a static
> population is not an important restriction in an industrialized
> economy in
> the short (2-3) and medium (5-10) run. Physical capital stocks
> could be
> given in the short run, if the rate of utilization and/or
> productivity is
> allowed to change.
>
> I agree that the mathematical tools are not decisive, but IMHO
> difference-eq opens up for quite different extentions/modification of
> models, than a simultaneus eq. model, which is locked into
> compartativestatics from the outset.
>
> But I will refrain from further comments on a paper I have not
> can I get hold of that paper?
>
>
> Regards
> Anders
>
>
> At 20:31 15.03.2005, Gerald_A_Levy@MSN.COM wrote:
> > > But since your model is in difference-eq form (dynamic), [...]
> >
> >Anders:
> >
> >If  it is a short-run model in which "productivity, population,
> and physical
> >capital stocks in place are all constant"  how can it be said to
> have a
> >"dynamic" form?    Difference equations by themselves do not a
> dynamic>model make.
> >
> >In solidarity, Jerry
>
>
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```

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