Flattening the COVID-19 curve: What works

“…policies preventing close contacts in large groups, such as public events, private gatherings, and schools are the most effective in reducing new infections… mediated by changes in population mobility patterns, which are consistent with time-use and epidemiological factors…

From our column at voxeu.org on our paper (joint with K. Tatsiramos and B. Verheyden)

Lockdown Strategies, Mobility Patterns and COVID-19

We develop a multiple-events model and exploit within and between country variation in the timing, type and level of intensity of various public policies to study their dynamic effects on the daily incidence of COVID-19 and on population mobility patterns across 135 countries. We remove concurrent policy bias by taking into account the contemporaneous presence of multiple interventions. The main result of the paper is that cancelling public events and imposing restrictions on private gatherings followed by school closures have quantitatively the most pronounced effects on reducing the daily incidence of COVID-19. They are followed by workplace as well as stay-at-home requirements, whose statistical significance and levels of effect are not as pronounced. Instead, we find no effects for international travel controls, public transport closures and restrictions on movements across cities and regions. We establish that these findings are mediated by their effect on population mobility patterns in a manner consistent with time-use and epidemiological factors.

Keywords: COVID-19, public policies, non-pharmaceutical interventions, mul- tiple events, mobility

JEL codes: I12, I18, G14

Download from IZA Discussion Paper Series.

Toll Index April 2020 | 24% drop!

corrected: 20200518-15:50hrs

A whopping 24% drop in incoming lorries (-22% for outbound) compared to April of 2019 (controlling for number of working days). Larger drop than in the great recession.

Starting in July 2018 the BAG – Bundesamt für Güterverkehr introduced yet another policy change which affected how lorries pay tolls within the MAUT system as well as the data that come out of this process which are used for computing the Toll Index. The change expanded the network of roads in which toll is due by adding all bundesstraßen to it.

While in the long run this is bound to make the Toll Index more accurate in these past twelve months it made it useless for nowcasting. Moreover the BAG had difficulty producing the numbers timely for about year. After July 2019 we can report year on year changes for each month (with a missing value in 2018 for all months from July to December and a missing value in 2019 for all months from January to June.

The Toll Index was first proposed in IZA DP5522 which was published in the Journal of Forecasting. It has been widely covered in national and international media (selection):

The German statistical office, in cooperation with the Bundesamt für Güterverkehr,  has taken the MAUT data in its portfolio of data products and their efforts can be found here. The Destatis document describing the data is here and here is their publication calendar for 2019.

Toll Index March 2020 – sizing COVID-19

How big is the impact of the COVID-19 pandemic on the economy? Here is another measurement to begin to fathom that extend of the damage.

The Toll Index for the month of March, based on fresh data from the German Bundesamt für Güterverkehr, shows a whopping 7.8% drop in inbound border crossing lorries and 10% drop for outbound ones compared to March of 2019 and controlling for number of working days.

The first and biggest drop since 2009 and the story is still developing.

Starting in July 2018 the BAG – Bundesamt für Güterverkehr introduced yet another policy change which affected how lorries pay tolls within the MAUT system as well as the data that come out of this process which are used for computing the Toll Index. The change expanded the network of roads in which toll is due by adding all bundesstraßen to it.

While in the long run this is bound to make the Toll Index more accurate in these past twelve months it made it useless for nowcasting. Moreover the BAG had difficulty producing the numbers timely for about year. After July 2019 we can report year on year changes for each month (with a missing value in 2018 for all months from July to December and a missing value in 2019 for all months from January to June.

The Toll Index was first proposed in IZA DP5522 which was published in the Journal of Forecasting. It has been widely covered in national and international media (selection):

The German statistical office, in cooperation with the Bundesamt für Güterverkehr,  has taken the MAUT data in its portfolio of data products and their efforts can be found here. The Destatis document describing the data is here and here is their publication calendar for 2019.

An internet picture of labor under COVID-19

COVID-19 pandemic

A week’s worth of hourly Google searches across the Globe on the topic of “coronavirus” now (blue) and four weeks ago.

Unemployment

A week’s worth of hourly Google searches across the Globe on the topic of “unemployment benefits” now (blue) and four weeks ago.

Videconferencing

A week’s worth of hourly Google searches across the Globe on the topic of “Zoom videoconferencing” now (blue) and four weeks ago.
A week’s worth of hourly Google searches across the Globe on the topic of “Cisco Webex videoconferencing” now (blue) and four weeks ago.
A week’s worth of hourly Google searches across the Globe on the topic of “GoToMeeting videoconferencing” now (blue) and four weeks ago.
A week’s worth of hourly Google searches across the Globe on the topic of “Skype videoconferencing” now (blue) and four weeks ago.

Working in teams online, collaborating

A week’s worth of hourly Google searches across the Globe on the topic of “Slack” now (blue) and four weeks ago.
A week’s worth of hourly Google searches across the Globe on the topic of “Microsoft Teams” now (blue) and four weeks ago.
A week’s worth of hourly Google searches across the Globe on the topic of “G Suite” now (blue) and four weeks ago.

Traffic congestions moves from the road to the internet

A week’s worth of hourly Google searches across the Globe on the topic of “Traffic Congestion” now (blue) and four weeks ago.
A week’s worth of hourly Google searches across the Globe on the topic of “Speedtest.net” now (blue) and four weeks ago.

Will video kill the academic research seminar?

The COVID-19 pandemic is impacting academic activity in a massive way. Conferences are cancelled for months in the future and research seminars are halted. Research seminars are starting to recover by moving online and future events are being re-designed as online meetings.

The website of the American Economic Association features a list of world wide, open, online seminars and events. The reason people are opening their seminar is because a typical payment plan of a video streaming platform will throw in unlimited scale for free with a moderately priced subscription. So seminar organizers feel that they can maximize the reach of their seminar for free. Make no mistake: it may well be that there is no substitute for a face to face but scale and cost reductions are interesting and hence online meetings might stay with us even after the coronavirus pandemic.

What does a world in which all seminars are online and open look like? If I can attend any seminar in the world from my home office does it even make sense that I too organize one? After all the reason I pay to fly out a speaker is to expose my local research group to quality research but now this exposure is abundant.

What does it mean for me as a presenter to present in one seminar and not another if seminars are online and open? As a presenter I choose where to present based on the perks of flying out (flight class, hotel, restaurants, museums, culture) and the quality of the place I am visiting i.e. of its local audience. But now the former is gone and I can get any audience anywhere without (alas) unfortunately knowing who is or will be in the audience…

People use a handful of video streaming platforms most of which are in the AWS cloud. So this is almost as if they use one single platform. Soon we will have to have a directory of the seminars as well (like AEA did) so your seminar will be just another entry in a calendar with a speaker and your logo. You cannot even be sure that your own researchers will attend yours and not another. So why would people still organize them?

If organizations continue to see a benefit competing for speakers (something unclear as yet) a compensation system for speakers might emerge to offset the absence of traveling perks. But why will organizations do so? A single platform might emerge facilitating the matching of seminar speakers to “research seminars” where speakers are compensated financially for a “performance” and an institution (the “organiser”) pays a fee to advertise on the stream thus also acquiring the right-off way for its own local research groups to interact with the speaker whereas all others are passive attendants…

Video might indeed kill the academic research seminar as we know it.

  • Update1: 20200328: HELP! “a weekly Zoom seminar where scholars present their ideas”