Frontmatter -- Preface -- Contents -- The setting of the problem -- Patent statistics -- The role of intellectual stimuli -- The use of important inventions as a cause of further inventions -- Productivity advance: A Case of supply and demand? -- The amount of invention is governed by the extent...

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...