If you look at IMF predictions of world GDP [1] you can see that simply taking l...

ivalm on March 8, 2019 | parent | context | favorite | on: How to earn your macroeconomics and finance white ...

If you look at IMF predictions of world GDP [1] you can see that simply taking last year's value would have had lower error for most years and in average.

[1] -- figure 2 https://www.ft.com/content/60581224-3335-11e8-b5bf-23cb17fd1...