Paul Romer’s focus is wrong
Udgivet d.
7. maj 2020 - 15:22
English
Sundhed
Paul Romer’s focus is wrong
Abstract
This paper argues that testing participation – and not testing capacity – is the biggest obstacle to a successful “test and isolate”-strategy, as recently proposed by Paul Romer. If R0=2.5, at least 60 percent of a population needs to participate in a testing program to make it theoretically possible to achieve an effective reproduction rate . I also argue that Paul Romer’s assumption about quarantine length is problematic, because it implicitly assumes that an infected and tested person is quarantined during the entire duration of the illness. With more realistic assumptions, where the fraction of the illness duration that is spent in quarantine depends on the test frequency, at least 80 percent of the population must participate to keep R0’<1, even if participants in the test program are tested every five days. Comprehensive testing, as proposed by Romer, is probably still a very cost-effective means of reducing the reproduction rate of the infection compared to mandatory lockdown policies, but it seems less promising than he suggests. However, comprehensive testing might also reduce voluntary social distancing in a non-cost-effective way.
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