Hammer or Nudge? International Policy Options for COVID-19

Like so many other researchers sitting at home, watching the news about COVID-19, I have been impressed at how virologists, epidemiologists and other medical experts have caught the ears of national policymakers, business leaders and the general public. Suddenly, scientific facts and evidence bask in the trust of public opinion and fake news is once again ‘fake’ in the real sense of the word: unreliable, not to be trusted by anyone. Something climate experts have been dreaming of for decades, not to mention my own, down-to-earth economic pleas to public authorities to invest more in public research.

But over time the scientific comments given on TV and radio in my two home countries, the Netherlands and Belgium, as well as neighbouring Germany and France, became dominated by each country’s own, national virology and epidemiological experts explaining how their country’s approach to ‘flattening the curve’ and bringing down the reproduction rate was best, it became clear, even to a non-expert in the field like myself, that many of the science-based policies used to contain COVID-19 were first and foremost based on ‘hypotheses’. With the exception of Germany, not really on facts. And as Anthony Fauci, Director of the US National Institute of Allergy and Infectious Disease, probably the world’s most respected virologist once put it: “Data is real. The model is hypothesis.”

So at the risk of being an ultracrepidarian – an old word which has suddenly risen in popularity – it seemed appropriate to have a closer, more critical look at the science-based policy advice during this COVID-19 pandemic. For virologists and epidemiologists, the logical approach to a new, unknown but highly infectious virus such as SARS-CoV-2, spreading globally at pandemic speed, is ‘the hammer’: the tool to crush down quickly and radically through extreme measures (social distancing, confinement, lockdown, travel restrictions) the spread of the virus and get the transmission rate’s value as far as possible below 1. The stricter the confinement measures, the better.

For a social scientist and social science-based policy adviser, a hammer represents anything but a useful tool to approach society or the economy with. Her or his preference will rather go to measures, such as ‘nudges’ which alter people’s behaviour in a predictable way without coercion. Actually, the first COVID-19 measure was based on a typical ‘nudge’: improving hand hygiene among healthcare workers which was now enlarged to the whole population. ‘Nudging’ in the face of a new virus such as SARS-CoV-2 will consist of making sure incremental policy measures build up to a societal behavioural change, starting from hand hygiene, social distancing, to confinement and various forms of lockdown. It will be crucial to measure the additional, marginal impact of each measure in its contribution to the overall reduction in the transmission of the virus. Introducing all measures at once, as in the case of the ‘hammer’ strategy, subsequently provides little useful information on the effectiveness of each measure ( on the contrary, in fact). In a period of deconfinement, one now has little information on which measures are likely to be the most effective. From a nudge perspective, achieving a change in social behaviour with respect to physical distancing: the so-called one-and-a-half metre society, will be an essential variable and measuring its impact on the spreading of the virus crucial. One of the reasons is that full adoption of such physical distancing automatically and without the need of coercion, will prevent the occurrence of large or smaller social gatherings without authorities having to specify the rules. This is implicit in the principle of nudging: it will be the providers, the entrepreneurs of personal service sectors who will have to come up with organisational innovations enabling physical distancing in the safe delivery of such services.

Back to the Connecting Ideas homepage