Thomas Piketty's Capital in the Twenty-First Century is the most widely discussed work of economics in recent history … reasons for Capital's phenomenal success, followed by the published reviews of Nobel laureates Robert Solow and Paul Krugman … contributors ask whether Piketty said enough about power, slavery, and the complex nature of capital. Laura Tyson and Michael …

rates caused by demographic forces. This insight is obtained in a model in which intangible capital cannot attract external … finance, firms are credit constrained, and there is substantial dispersion in productivity. In a tangibles-intense economy … aggregate output. An increase in the share of intangible capital in production reduces the borrowing capacity and increases the …