Dass Menschen von sozialen Kontakten auch bei wirtschaftlichen Aktivitäten profitieren, weiß so mancher aus eigener Erfahrung. Aber können soziale Kontakte das Wachstum ganzer Regionen beflügeln? In der Studie wird argumentiert, dass die deutsche Geschichte die seltene Chance bietet, den...

We show that the Carry Trade exploits a static interest rate differential which is largely unrelated to the fact that currencies whose interest rates exceed their long-run average tend to appreciate (the Forward Premium Puzzle). The evidence is consistent with the presence of a static risk...

We use the fall of the Berlin Wall in 1989 to show that personal relationships which individuals maintain for non-economic reasons can be an important determinant of regional economic growth. We show that West German households who have social ties to East Germany in 1989 experience a persistent...

Many central banks manage the stochastic behavior of their currencies' exchange rates by imposing pegs relative to a target currency. We study the effects of such currency manipulation in a multi-country model of exchange rate determination with endogenous capital accumulation. We find that the...

During Egypt's Arab Spring, unprecedented popular mobilization and protests brought down Hosni Mubarak's government and ushered in an era of competition between three groups: elites associated with Mubarak's National Democratic Party (NDP), the military, and the Islamist Muslim Brotherhood....

We show that the stock market may fail to aggregate information even if it appears to be efficient and that the resulting decrease in the information content of stock prices may drastically reduce welfare. We solve a macroeconomic model in which information about fundamentals is dispersed and...

We introduce the information microstructure of a canonical noisy rational expectations model (Hellwig, 1980) into the framework of a conventional real business cycle model. Each household receives a private signal about future productivity. In equilibrium, the stock price serves to aggregate and...

Differences in real interest rates across developed economies are puzzlingly large and persistent. I propose a simple explanation: Bonds issued in the currencies of larger economies are expensive because they insure against shocks that affect a larger fraction of the world economy. I show that...

We decompose violations of uncovered interest parity into a cross-currency, a betweentime-and-currency, and a cross-time component. We show that most of the systematic violations are in the cross-currency dimension. By contrast, we find no statistically reliable evidence that currency risk...