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Brief von Josef Steindl an Jerzy Osiatyński

Bibliographic data

Correspondence

Document type:
Correspondence
Collection:
Josef Steindl Collection
Title:
Brief von Josef Steindl an Jerzy Osiatyński
Author:
Steindl, Josef
Recipient:
Osiatyński, Jerzy
Scope:
Typoskript mit Unterschrift, 2 Blätter, 2 Seiten
Place of publication:
Wien
Year of publication:
1975-09-18
Source material date:
18.9.1975
Language:
English
Note:
Briefkopie mit handschriftlichen Anmerkungen.
Shelfmark:
S/B.46
Rights of use:
All rights reserved
Access:
Free access

Full text

I 
Vienna, 18.9.1975 
Dear Osiatynski, 
In my opinion, Kaleckis exposition in the relenant pages 
152 to 155 of Economic dynamics aontains a flaw. He discusses 
the existence of real roots of the trend equation, using 
linear approximations, such as in particular, e 
which are valid only for small rates of growth v. 
His arguments however, require that they should be valid for 
all values of v. In fact, if we go back to an exact formulation, 
using exponentials instead of the approximation, we find that 
the straight line in the graphs (representing the left side of 
equation 35 ) is in reality a curve which turns apwards for large 
values of v, so that there is always a real root! Moreover, 
in case II there are three roots instead of two, and the 
discussion of stability is inadequate to prove that the third 
root is ephamerial. My own solution to this difficulty would have 
c-'A£& JL 
been to admit only the case flne as economically relevant solution, 
4.e. to require 6^ m. 
Now the new typescript version of these pages does 
nothing decisive to remove these difficulties. In fadt, the 
same approximations essentially are used again. If we use 
exponentials^then we get in place of the equation 35 of the typesript 
^ d - /yg. it -t- 'ir e ~t~« 
which shows again that the caselll (no root) does not exist, 
and that in case II there will be three roots. 
I think that the new version is an improvement only in 
relatively minor details of introducing the approximations , 
I think there is no reason why it should be introduced into the 
edition of the works. 
A very puzzling question is of course, what Kalecki 
really thought whah he wrote it. Unless I am wrong myself 
(which is never excluded) I find it surprising that , an re-working 
the text, he was not struck with the difficulties mentioned. 
He certainly felt unhappy about the argument; I think we can 
be pretty sure that he was not satisfied with the typescript 
dropped 
version either. It is significant that he aja*n&$ x ti8S the whole 
approach ( I mean, a trend term dependent on the capitalstock) ^ 
in his 1968 paper on the trend (regrettably, I think: the whole 
approach deserves to be pursued ). 
-
	        

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Steindl, Josef. “Brief Von Josef Steindl an Jerzy Osiatyński.” N.p., 1975-09-18. Print.
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