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Welcome to Matt Ridley's Blog
Matt Ridley is the author of provocative books on evolution, genetics and society. His books have sold over a million copies, been translated into thirty languages, and have won several awards.

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The difference between reciprocity and exchange

Plus other matters aired on the radio

Here's an hour long conversation I did on Econtalk with economist and novelist Russ Roberts about trade, prosperity and Adam Smith. It includes a discussion of why animals can manage reciprocity but not, apparently, exchange.