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...

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 structure of banking markets affect macroeconomic volatility and, if yes, is this link different in low-income countries? Banking markets in low-income countries differ from those in developed market economies. Banking systems in lower-income countries are typically smaller and less...

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...

The German economy continues to recover, and will grow by 2.2 percent in 2015 and by 1.9 percent in 2016. The unemployment rate will further decline, to 6.4 percent this year and 6.1percent in 2016. Inflation, which averages 0.5 percent this year, will be substantially dampened by the slump in...

Das DIW Berlin prognostiziert für die deutsche Wirtschaft für 2011 ein Wachstum von 2,7 Prozent, im Jahr 2012 dürfte der Zuwachs noch 1,4 Prozent betragen. Besonders im ersten Vierteljahr 2011 dürfte bei der Wirtschaftsleistung ein deutliches Plus von knapp einem Prozent gegenüber dem...

Das DIW Berlin prognostiziert für die deutsche Wirtschaft im Jahr 2010 ein Wachstum von 3,4 Prozent, im Jahr 2011 werden es 2,0 Prozent sein. Der Aufschwung nach der schwersten Rezession der Nachkriegszeit verläuft damit kräftig, auch wenn die hohen Wachstumsraten der ersten Jahreshälfte...

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...