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February 14, 2007



The Malthusean model assumes that birth rates and death rates are both determined by _income_. If this assumption is violated, the whole story breaks down. If you try to rescue it by introducing heterogeneous goods, etc. the model becomes tautological - it makes no useful predictions.

Nathan Smith

Hmm. I hadn't thought about it that way before. Is that a sharper way of saying the same thing I said, or is it a slightly different argument? Anyway, well said.

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