Collective-action problems arise when private actions generate common consequences; for example, the private provision of a public good. This article asks: what shapes of public-good production function work well when play evolves over time, and hence moves between equilibria? Welfare-maximising...

Between the late 1970s and late 1980s, the UK Regional Accounts data suggest a much smaller rise in the South East earnings premium and consequently a much smaller increase in the regional dispersion of earnings than do the other sources of data. We discuss several possible explanations for this...