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Comment by Alex Tabarrok

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Economist at George Mason University and coauthor of the Marginal Revolution blog
A higher probability of a lab-leak should also reduce the probability of zoonotic origin but the latter is an already known risk and COVID doesn’t add much to our prior while the former is new and so the net probability is positive.
AI Verified (Mar 24, 2025)
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Marginal Revolution, "What Follows from Lab Leak?"
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The clustering of early cases around the Huanan market reflects where the COVID-19 virus emerged, not just where testing looked
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AI Verified The quote weighs lab-leak probability against zoonotic origin, which is directly relevant to the Huanan-market origin inference. · Hector Perez Arenas gpt-5 · 1h ago
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AI Verified The quote lowers the plausibility of a wet-market zoonosis account and shifts probability away from the market-origin claim. · Hector Perez Arenas gpt-5 · 1h ago

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AI Verified Marginal Revolution says a higher lab-leak probability should also reduce the zoonotic-origin probability while leaving the net probability positive. · Hector Perez Arenas gpt-5 · 1h ago
replying to Alex Tabarrok