A vast empirical literature has documented delayed and persistent effects of monetary policy shocks on output. We show that this finding results from the aggregation of output impulse responses that differ sharply depending on the timing of the shock: when the monetary policy shock takes place...

Why is GDP growth so much more volatile in poor countries than in rich ones? We identify four possible reasons: (i) poor countries specialize in more volatile sectors; (ii) poor countries specialize in fewer sectors; (iii) poor countries experience more frequent and more severe aggregate shocks...

Understanding and quantifying the determinants of the number of sectors or firms exporting in a given country is of relevance for the assessment of trade policies. Estimation of models for the number of exporting sectors, however, poses a challenge because the dependent variable has both a lower...

We estimate the impulse response of key US macro series to the monetary policy shocks identified by Romer and Romer (2004), allowing the response to depend flexibly on the state of the business cycle. We find strong evidence that the effects of monetary policy on real and nominal variables are...

A large literature has documented statistically significant effects of monetary policy on economic activity. The central explanation for how monetary policy transmits to the real economy relies critically on nominal rigidities, which form the basis of the New Keynesian (NK) framework. This paper...

Economies at early stages of development are frequently shaken by large changes in growth rates, whereas advanced economies tend to experience relatively stable growth rates. To explain this pattern, we propose a model of technological diversification. Production makes use of input-varieties...

Economies at early stages of development are frequently shaken by large changes in growth rates, whereas advanced economies tend to experience relatively stable growth rates. To explain this pattern, we propose a model of technological diversification. Production makes use of input-varieties...

Existing wisdom links increased openness to trade to greater macroeconomic volatility, as trade induces a country to specialize, increasing its exposure to sector-specific shocks. Evidence suggests, however, that country-wide shocks are at least as important as sectoral shocks in shaping...

Every year during the second and third quarters (the "hot season") housing markets in the U.K. and the U.S. experience systematic above-trend increases in both prices and transactions. During the fourth and first quarters (the "cold season"), housing prices and transactions fall below trend. A...

Every year housing markets in the United Kingdom and the United States experience systematic above-trend increases in both prices and transactions during the second and third quarters (the "hot season") and below-trend falls during the fourth and first quarters (the "cold season"). House price...