People 'over-produce' pollution because they are not paying for the costs of dealing with it.

Self-interest, to be sure, is one of the most important, but we have many other motives - honesty, self-respect, altruism, love, sympathy, faith, sense of duty, solidarity, loyalty, public-spiritedness, patriotism, and so on - that are sometimes even more important than self-seeking as the driver of our behaviors.

It's not just about the current economic environment. History shows that slashing budgets always leads to recession.

The washing machine changed the world more than the Internet.

Rational thinking is an important aspect of human nature, but we have imagination, we have ambition, we have irrational fear, we are swayed by other people, we get indoctrinated and we get influenced by advertising.

The danger is not only that these austerity measures are killing the European economies but also that they threaten the very legitimacy of European democracies - not just directly by threatening the livelihoods of so many people and pushing the economy into a downward spiral, but also indirectly by undermining the legitimacy of the political system through this backdoor rewriting of the social contract.

In manufacturing, where mechanization and the use of chemical processes are much easier, it is easier to raise productivity than in services. In contrast, by their very nature, many service activities are inherently impervious to productivity increase without diluting the quality of the product.