1. The Natural Rate of Interest: Estimates, Drivers, and Challenges to Monetary Policy;Claus Brand;ECB Occasional Paper,2018
2. Savers Will Benefit From A Return to Sound Money;Joseph H Davis,2023
3. The Rise and Fall of the Natural Interest Rate;Gabriele Fiorentini;Banco de Espan�, Documentos de Trabajo,1822
4. The American Business Cycle