Does the mere presence of big banks affect macroeconomic outcomes? In this paper, we develop a theory of granularity (Gabaix, 2011) for the banking sector, introducing Bertrand competition and heterogeneous banks charging variable markups. Using this framework, we show conditions under which...

Does the mere presence of big banks affect macroeconomic outcomes? Gabaix (2011) shows that idosyncratic shocks can have aggregate effects if the distribution of firm sizes in manufacturing follows a power law distribution. Our contribution is two-fold. First, we expand the theory of granularity...

This paper documents large cross-country variation in the relationship between bank competition and bank stability and explores market, regulatory and institutional features that can explain this variation. We show that an increase in competition will have a larger impact on banks' fragility in...

This paper documents large cross-country variation in the relationship between bank competition and bank stability and explores market, regulatory and institutional features that can explain this variation. We show that an increase in competition will have a larger impact on banks' fragility in...