Since the global financial crisis and the related restructuring of banking systems, bank concentration is on the rise in many countries. Consequently, bank size and its role for macroeconomic volatility (or: stability) is the subject of intense debate. This paper analyzes the effects of...

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 has veered back on an upward course, after weak growth in the summer semester 2014. In this projection, real GDP is estimated to grow by 1.5 percent in 2014, by 1.4 percent in 2015 and by 1.7 percent in 2016. Inflation is projected to remain low, with 0.9 percent in 2014, 0.7...

The German economy continues to recover, and will grow by 2.2 percent in 2015. With slightly abated increases, the annual growth rate will be 1.9 percent in 2016. Driven by this favorable economic development, the unemployment rate will further decline, to 6.4 percent this year and 6.1 percent...

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...