Economists agree at least on this: it is difficult to find evidence for, or merely to imagine any growth mechanism that does not work through the increase of a stock of capital in one way or another. From a more policy point of view - in particular in terms of the debate of economic development...

It is not so long ago that policy makers thought that excessive regional disparities would disappear automatically in the long run. Arbitrage possibilities arising from competition and factor mobility were expected to induce a more than average growth performance in lagging regions. Having the...