1 | Election polling failed in 2020, the most striking example being perhaps the failure of any poll to predict Susan Collins' re-election.

Unfortunately, the problem with surveys affects more than our politics. It limits our ability to measure population health.
2 | People who do household epidemiological surveys have been telling me for years that rates of refusal have been rising. These surveys are part of the empirical foundation of population health.
3 | When you have < 40% participation rates, which is not uncommon, your disease prevalence estimates become full of selection effects.
4 | There are other ways to estimate the prevalence of diseases or risk factors. But they also have serious biases, and we used to rely on random household surveys to provide a gold standard. We are losing that.
5/fin | People are tired of being surveyed. There may also be losing trust in public health institutions, which is discouraging for many reasons. I don't know how we fix this.
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