Debt still matters is an essay on debt at the Chicago Booth Review. It is a cleaned up and edited version of previous blog posts here and here, but a better essay.
John H. Cochrane considers the following as important: Debt, European Debt Crisis, inflation
This could be interesting, too:
Menzie Chinn writes Messages from the 21Q2 GDP Advance Release: No Economy Is an Island
Menzie Chinn writes Business Cycle Indicators for End-July 2021
David writes Public and Policy Concerns Around Inflation
Menzie Chinn writes PCE Price Index Overshooting … or Undershooting