As a rich country, we can, in some sense, "afford" the war. But spending money on the war means that we are not spending money on other things that we could have spent the money on.

I think that for the developing world there are many versions of capitalism, and countries have to choose one that's appropriate.

Trump is particularly unfit to serve because he approaches these without any view of what the truth is, and he approaches these with an enormous amount of prejudice. You cannot begin saying we want to solve the problem when you have a mindset that is against the Mexicans, against Islamists.

Capital market liberalization includes freeing up deposit and lending rates, opening up the market to foreign banks, and removing restrictions on capital account transactions and bank lending. The focus is on deregulation, not on finding the right regulatory structure.

The important lesson of the deficit is - and the national debt - is we have to be careful about how we're spending money.

The proposal for a new global reserve currency - or Special Drawing Rights - is a good idea for many reasons. Yes, for the Chinese it would cushion any fall in the value of the dollar per se because it would only be part of a basket of other currencies, including the yen and the euro.

Now it is unambiguously clear that trickle-down economics does not work. But what does that mean? That means we have to structure our economic policies to make sure that we have shared prosperity. And you don't do that by giving a tax cut to the big winners and raising taxes on those who have not done very well. Your economic policy has to respond to the way our economic system has been working.