Thomas Piketty's Capital in the Twenty-First Century is the most widely discussed work of economics in recent history, selling millions of copies in dozens of languages. But are its analyses of inequality and economic growth on target? Where should researchers go from here in exploring the ideas...

In this essay I compare two different theoretical frameworks in economics for orienting analysis of issues in technology policy. One is a neoclassical framework that sees appropriate policies as dealing with market failuresʺ. The other framework is provided by an evolutionary and institutional...