Reducing interactions among people is seen as critical to reducing propagation of the novel coronavirus (COVID-19). Determinants of Social Distancing and Economic Activity during COVID-19: A Global View., with apparent success in advanced countries, we find in our new working paper
While there is controversy around whether this should be the goal in developing countries as well, there is also concern about whether such measures even work. Government capabilities to enforce such measures may be weaker and resistance will be higher since the trade-off with livelihood is harsher.
At the other end of the cycle –
Underlying both issues is the question of how much demobilization is in fact due to NPIs. We argue here that globally, most result from voluntary decisions of individuals reacting to the virus incidence count. This suggests that much social distancing will happen regardless of NPIs. Further, viewed through this lens, restrictions may often function more like a coordinating device among increasingly predisposed individuals than repressive measures per se – if we’re all working from home, then I won’t be viewed badly if I do. Whether schools are online, or in-person, requires a decision that individual concerned parents cannot effect. Some evidence from history supports such views. As Crosby (2003) notes, restrictive policies couldn’t be put into place during the 1918 Influenza epidemic in San Francisco until the public was alarmed by the mortality rate and that , “Fear had been the enforcer of the Board of Health’s policies,” (p. 108) not the authorities themselves. Clearly, for those not inclined to demobilize, NPIs play their traditional role.
Using Google data on mobility derived from the Maps smart-phone application, explicitly provided as a measure of social distancing, against the log of the case incidence per capita, we looked at seven countries: Italy, Japan, Sweden, United Kingdom (UK), the United States (US) and two upper middle-income countries, Brazil and South Africa, for which we have reasonable smart phone coverage.
Three findings emerge:
- First, in Brazil, Italy, South Africa, Sweden, UK and the US, individuals are taking self-protective measures in response to an increased perception of risk. Not so much in Japan.
- Second, NPIs have large effects in Italy, South Africa, and the UK. In all countries, however, the “voluntary” component still contributes the largest share. In Sweden, mobility falls 60 points, similar to that seen in the US.
- Third, Japan’s relatively low responsiveness to case incidence may precisely suggest the importance of NPIs as coordinating measures, that were largely absent. The very tepid measures under the April 7 State of Emergency faced strong headwinds in the form of other social norms such as the concern by workers that they’ll be seen as slackers if they don’t physically appear for work: unless everyone is sent home, everybody goes to work.
Workplace Mobility vs. Cases and Closure of Non-Essential Businesses: Selected Countries
Our findings were confirmed in a global sample of countries divided into Low Income Countries (LIC), Lower Middle Income (LMIC), Upper Middle Income (UMIC) and High Income (HIC), where there are no NPIs. The effect of increased COVID incidence on mobility, voluntary demobilization, is both of larger magnitude than in the US and very similar across LMICs and HICs. However, that there is no effect in LICs is consistent with the argument that in very poor countries, people cannot afford not to work and hence they will continue to do so.
The impact of NPIs themselves is mixed and often large but remains less important than the voluntary component in all but LICs. Workplace closures, school closings, restrictions on internal mobility are all important most clearly in LMICs.. In LICs, the only NPI that appears to have any effect is closing public transportation.The weaker self-demobilizing effect in LICs may also suggest that, more generally, the impact of enforcing NPIs bites disproportionately on poorer people.
Mapping to Economic Activity
Do these voluntary declines in Google mobility, in fact, map to economic activity? Preliminary evidence from the US and Sweden suggests they do. Take the case of restaurant reservations by state against COVID incidence in the US. The fall in reservations predated the closing of non-essential businesses and there is virtually no impact of business closing measures. In the same vein, movie theater releases and revenues in Sweden, a country that imposed suggested non-essential business closings and banned 50+ meetings only at the end of March. Long before this, movie revenues (demand) dropped off entirely while releases (supply) continued more or less unchanged. The results again suggest that what slowed economic activity was not the NPIs, but rather increased self-enforced demobilization as evidence of the magnitude of the threat accumulated.
These findings offer both good and bad news.
- On the good side, they imply that for many countries, self-enforcing dynamics and NPIs can reduce mobility substantially without much state capacity. We can in no way say such demobilization is optimal, and NPIs may be required to reach the “right” level. But that mobility fell almost as much in Sweden, with few NPIs, as the US dramatically illustrates this point. The poorest countries appear to be the exception to this pattern; the finding that only shutting down public transport has any effect is consistent with arguments that government capacity may be generally low, and resistance to demobilizing high where the trade off with lost livelihoods is more severe. This also points to the fact that those who voluntarily demobilize may be those better off and the NPIs may wind up biting more on those who can’t afford not to work.
Note: A version of this blog was first published on VOX.