Why are some countries so much richer than others? Development Accounting is a first-pass attempt at organizing the answer around two proximate determinants: factors of production and efficiency. It answers the question “how much of the cross-country income variance can be attributed to...

The study focused on a cross-section of countries observed in the mid-1990s, so the conclusions from that effort are beginning to be a bit dated. In addition, signi cant revisions of the data underlying the 2005 paper have been published. Last but not least, in the intervening years become aware...