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The trouble of filling Copy!
Lawrance G. Lux — ... Paul Krugman is now proposing a Selective Service for Mathematics (I am teasing, Paul). What he is saying consists of a Statement that economic precepts must work out in both Math and logical Proof, in order to be sound. The difference between Sound and Truth stands that Sound should be Right, while Truth has little to do with Math models; did you not notice the degrees of Accuracy always associated with such models. Sound means that you possess a stable assertion, capable of being assumed without further proof. Sound economic principles also have a somewhat ...

Aftermath
EconoSpeak — A comment on Krugman's blog: As an Economics graduate student and tutor of first year economics, I’d have to say Maths has helped me a lot come to grips and simplify into english with a lot of economic concepts for my own benefit and that of my students. ...