In absolute terms, we may have to look at restricting the number of flights people take.

The probability that we face global warming caused by fossil fuels is now so overwhelming that it is legitimate to doubt the motives of those who deny it

The richer people, when they get another $100,000, or another million, or 10 million, don't tend to spend it as much as the poorer people would if they got another $100 or $1,000 or $5,000. All the empirical evidence suggests that the rich tend to consume a lower proportion of income than middle and lower-income people.

In absolute terms, we may have to look at restricting the number of flights people take.

In economics, when you put together a highly elastic thing and a highly inelastic thing, you create extraordinary potential for turbulence, volatility, and for unstable prices.

The capitalist system is not delivering those decade-after-decade increases it promised. We're not where we should be in terms of our national economies. We don't know how to get out of this malaise and I think we now have to consider more radical policies.

We need to move beyond the demonisation of overpaid traders ... In finance and economics, ill-designed policy is a more powerful force for harm than individual greed or error.