First, we compute the differences between the output paths for 2020–2030 projected before and after the pandemic (the shaded area in Figure 1) and estimate its present value discounting at a 0% real interest rate (a reasonably conservative assumption in a context where real rates are negative for most developed countries). This yields a total loss of about half of global GDP.
Next, there is the question of the fiscal stimulus (equivalent to 15% of GDP, according to the IMF fiscal monitor) without which the output loss in 2020 would have been much steeper. How much of the economic impact of the fiscal unwinding is properly accounted for in the revised growth projections (Beck et al. 2021), particularly given that a big part of the stimulus (6% of the 15%) was below the line (loans, equity stakes, guarantees) with a cost that is contingent on the speed and composition of economic recovery in each country? There is no simple answer here. Moreover, we are ignoring potential bouts of financial stress or debt restructurings in heavily indebted countries (Persaud 2021), as well as the second wave of stimulus already in line for 2021 in many advanced economies. All things considered, adding the full 15% of GDP as an indicative measure of the cost of fiscal support does not look unreasonable.
Third, there is the value of the excess deaths due to Covid-19. There is, of course, no uncontroversial way to put a value on human life. For the sake of argument, we follow a recent estimation for the US by Cutler and Summers (2020) that uses the ‘statistical lives’ value to place it between $10 million and $7 million per life. If we take the considerably more conservative $5 million per life, acknowledging that the statistical value may vary across countries, the cost related to the global cumulative deaths registered so far amounts to 16.9% of global GDP.
Author(s): Eduardo Levy Yeyati, Federico Filippini
Publication Site: Vox EU