Under which conditions do usability constraints for regulatory capital buffers emerge? To answer this question, we build a non-linear structural banking sector model with a minimum capital requirement that banks are not allowed to breach, and a capital buffer requirement (CBR) that banks can...

Motivated by the coexistence of retail and wholesale banks with distinct risk profiles under uniform capital regulation, and by the lack of quantitative evidence on whether differentiated capital requirements can reduce bank runs and interbank frictions in low-income monetary unions, this paper...