The bottom half of humanity is living in severe poverty; not all of them are malnourished or severely deprived now, but they are extremely vulnerable to even small upsets in their income or in the prices they face of basic necessities, and when something like this happens, they can be thrown off kilter in terms of a disease of a family member or a change in food prices; anything like that can throw them into destitution.

What we should do is require or at least permit innovators to license their green innovations free of charge in exchange for public payments based on the impact this innovation has on the environment - emissions averted or something of this sort.

Our global institutional arrangements - the basic ground rules that govern our world economy - are human-made. They don't exist naturally, nor are they God-given. We make these rules, those of the WTO [World Trade Organization] Treaty for instance, which fill tens of thousands of pages. These words have been strung together by human beings and are also interpreted and enforced by human beings.

You may know that in India now the Tata car is becoming all the rage; you can buy it for one lakh - $2000 dollars - it's very, very cheap. So India seems to be going the route that China went a few years ago and that developing countries all over the world seem to want to follow, namely, to rely on these personal vehicles, which is just an irrational way of organizing transport.

Purchasing power parities are not a reasonable method for comparing households across countries or currencies. The reason for this is simply that PPPs are sensitive to the prices of all the commodities, goods and services, that households are consuming worldwide, with each commodity weighted in the calculations according to its share in international household consumption expenditure.

For the present system to work, poor people must be excluded from the innovation, because if they could get access at an affordable price, then affluent people would find ways to buy it cheaply as well - and then the innovator would be poorly rewarded and introductions of new medicines would decline.

Economists operate with this image of the homo economicus, the rational economic agent, and while such agents are rare in the wider world, they are common in economics departments. Exemplifying the homo economicus paradigm, economists typically choose their research projects and hypotheses so as to promote their own careers, to maximize their lifetime income. This explains the astonishing pressures toward conformity in academic economics: how deviant views (except those by a few who have already achieved stardom) get crushed by an army of conformists.