The recent crisis has demonstrated that a financially open economy has many sources of vulnerability. Even when a country does its homework, it remains at the mercy of developments in external financial markets. So, one lesson is that policy needs to guard not just against domestic shocks, but...

"Yes. We construct a measure of aggregate technology change, controlling for varying utilization of capital and labor, non-constant returns and imperfect competition, and aggregation effects. On impact, when technology improves, input use and non-residential investment fall sharply. Output...