We consider two happiness puzzles. First, many studies show that only relative income matters for well-being. Yet the Gallup data for the United States and from the rest of the world show no such result, at least for life evaluation. There may be relative income effects in hedonic well-being...

I discuss the measurement of world poverty and inequality, with particular attention to the role of purchasing power parity (PPP) price indexes from the International Comparison Project. Global inequality increased with the latest revision of the ICP, and this reduced the global poverty line...

This paper develops and implements a method for estimating price elasticities of demand using cross-sectional household survey data. Geographically clustered households report unit values, which when corrected for quality effects and for measurement error, indicate the underlying spatial...

This paper introduces endogenous and directed technical change in a growth model with environmental constraints. The final good is produced from "dirty" and "clean" inputs. We show that: (i) when inputs are sufficiently substitutable, sustainable growth can be achieved with temporary...

We find that greater institutional ownership is associated with more innovation. To explore the mechanism, we contrast the "lazy manager" hypothesis with a model where institutional owners increase innovation incentives through reducing career risks. The evidence favors career concerns. First,...