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...

Government interventions into the financial system in the form of bail out operations or liquidity assistance are often justified with the systemic importance of large banks for the real economy. In this paper, we test whether idiosyncratic shocks to loan growth at large banks have effects on...

Over the past decades, banks have significantly increased their cross-border asset positions. The ongoing crisis on international financial markets has raised the question whether this increase in cross-border activities has allowed banks to diversify risks and to what extent it has increased...

Over the past decades, banks have significantly increased their cross-border asset positions. The ongoing crisis on international financial markets has raised the question whether this increase in cross-border activities has allowed banks to diversify risks and to what extent it has increased...

Government interventions into the financial system in the form of bail out operations or liquidity assistance are often justified with the systemic importance of large banks for the real economy. In this paper, we test whether idiosyncratic shocks to loan growth at large banks have effects on...

We explore the impact of large banks and of financial openness for aggregate growth. Large banks matter because of granular effects: if markets are very concentrated in terms of the size distribution of banks, idiosyncratic shocks at the bank-level do not cancel out in the aggregate but can...

Russia's foreign debt problems worsened substantially after the financial crisis of 1998. The paper focuses on the key role of the government in servicing foreign debt and promoting institution building by showing how foreign debt influences the choice between official and unofficial taxation....