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Maybe it's just my own ignorance of modern economics, but I am yet to see a mathematical model that captures the rich theory I see outlined in Keynes' book.

We have met the enemy, and he is us — Pogo
by Migeru (migeru at eurotrib dot com) on Sun Feb 3rd, 2008 at 11:12:01 AM EST
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I'm not an economist either, but I think there is considerable mathematical theory in modern economics...
http://www.ioe.ac.uk/esrcmaths/sheila1.html
http://econpapers.repec.org/article/oupcambje/v_3A14_3Ay_3A1990_3Ai_3A1_3Ap_3A29-47.htm
by asdf on Sun Feb 3rd, 2008 at 11:17:08 AM EST
[ Parent ]
This is from your second link.

EconPapers: Keynes on Mathematics: Philosophical Foundations and Economic Applications

Keynes's hostility was aroused not by mathematics itself, but by pseudo-mathematics, or the failure to respect the nature and applicability of formal methods. Underlying Keynes's views is his distinctive philosophical framework, and the principle that logic (or philosophy) should precede and supervise the application of mathematics.
I have not read a lot of mathematical economics, but as a mathematician trained in physics I was unimpressed with Samuelson's Magnum Opus "Foundations of Economic Analysis", for instance. It's just ugly stuff.

And this is from your second link.

THE USE OF MATHEMATICS IN ECONOMICS

Mathematical tools have allowed many advances in economic theory. But at the same time, the difficulty in combining pure theory with applied economics has allowed the two strands to proceed according to different agendas. Even so, there are elements in common (presumption of equilibrium, fixity of meaning of terms and of the objects of measurement, etc) which provide the basis for mathematical treatment, but which nevertheless are controversial. Much of this issue boils down to the question of how far a study of complex social systems is amenable to the (mathematical) methods of analysis adopted by the physical sciences.

What was your point again?

We have met the enemy, and he is us — Pogo
by Migeru (migeru at eurotrib dot com) on Sun Feb 3rd, 2008 at 11:35:46 AM EST
[ Parent ]
I hear you. Unfortunately, lack of a decent mathematical foundation leads to, or at least allows, the Pirate-count based climate change model. Or whatever.
by asdf on Sun Feb 3rd, 2008 at 11:40:21 AM EST
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No, of course not, because I think mathematics has a more difficult time expressing a complex theory like Keynes's properly, especially when it is boiled down into a simple model like ISLM.

Conservatives want live babies so they can raise them to be dead soldiers. - George Carlin
by Drew J Jones (myfriends@thisispancakes.com) on Sun Feb 3rd, 2008 at 11:26:19 AM EST
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