What’s a country’s optimum population size?

The world’s population is growing – and we seem to be feeling it a bit in almost every part of the world – some more than most. But could the population in some countries, like Australia for example, actually be too small … would the economy work better if there were more people in it. Phil Dobbie asks Prof Steve Keen if a small population hinders competition and economic efficiency? Notwithstanding the broader argument that the planet’s population cannot keep on growing at the same rate forever … or even very long.

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