https://cepr.org/sites/default/files/policy_insights/PolicyInsight91.pdf
https://eml.berkeley.edu/~dromer/papers/RomerandRomerFinancialCrises.pdf
https://ecipe.org/wp-content/uploads/2020/07/ECI_20_OccPaper_04_2020_LY05.pdf
https://www.brookings.edu/articles/the-hutchins-center-explains-the-neutral-rate-of-interest/