What major insights have emerged from development economics in the past decade, and how do they matter for the World Bank? This challenging question was recently posed by World Bank Group President David Malpass to the staff of the Development Research Group. This paper assembles a set of 13...

The origins of "capital fundamentalism' - the notion that physical capital accumulation is the primary determinant of economic growth - have been often ascribed to H arrod's and Domar's proposition that the rate of growth is the product of the saving rate and of the output-capital ratio. I t is...