Also possibly something like the rumored off-target BCG vaccine effect. Though California vs New York suggest that even short differences in lockdown might have order of magnitude effects, so China data are probably not off by an order of magnitude. Maybe 2x-3x off.
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If you could be administered a medical test against your will, by people who have entered your house without a specific warrant, and taken away to quarantine, would you be okay with that? I think it’s technically feasible in the US right now only under martial law right?
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So... the case that per capita is meaningless because outbreaks are scale free. I’m not sure I buy this. You can’t just assume scale-free based on lack of correlation. A country is a logistics/travel connectivity cluster, not a meaningless fiction. https://twitter.com/jburnmurdoch/status/1244380095164420101?s=21 …https://twitter.com/jburnmurdoch/status/1244380095164420101 …
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I think the way to combine cluster analysis and country analysis is some notion like mean-free-path. The right unit of analysis is neither the “country” nor the “outbreak cluster” but something else. Populations are not structureless Petri dishes. They gave a mobility topology.
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I’d buy the scale free argument if cities were large open spaces within walls where people all just stood still 3 feet apart and virus was jumping like a wildfire through a forest. No. We move, at varying speeds, through striations. The connectivity matters.
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Per capita is likely a terrible way to control for country effects, but country effects must exist and show up if modeled right. Wuhan and New York are both important economic hubs with a lot of travel for example.
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Maybe the right way to adjust is to Ignore country boundaries but segment graph of air travel and road travel connectivity bandwidth by a min-cut/max-flow logic, to define de facto “logistics countries”. This would make Seattle part of an Asian hub, NY part of an EU hub.
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Add an MLM attribution logic. Wuhan gets a fraction of the case count of all 1-degree removed air linked cities, regardless of country they’re in. Recursively back from newest hubs. Many big cities are better connected to international trading partners than national hinterland.
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Idea for a graph theory project: use the flight connectivity data and dates of travel restrictions to construct city-clusters that should be treated as “Covid19 nations”
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End of conversation
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