Today if you look at most economic textbooks, economics is not defined by subject matter. It's presented as a science of social choice that applies not only to material goods - not only to flat-screen televisions - but to every decision we make, whether it's to get married, or to stay married, whether to have children and how to educate those children, or how to look after our health.

I think it would be a great tragedy to devote medical resources and genetic technological breakthroughs to purposes that are not to do with health or medicine, but instead are to do with satisfying the desires that are created by the consumer society.

I do think it is very important that the religious communities do try to bring their teachings and their insights to bear on the stem cell debate and on the debate about genetic engineering.

I think the reason we might hesitate to pay cash to students for doing well on tests or getting good grades or reading books is that we sense that the monetary payment is an extrinsic reward.

If parents are aiming at choosing children who will be good athletes, or great musicians, or who will get into Ivy League schools, or who will be tall enough to make the basketball team, then there is a danger that the life of the child will bear the burden of that expectation; and the risk of disappointment and the cost of disappointment will be even higher than they are now, and even now they can be considerable.

In natural pregnancy, more than half of fertilized eggs fail to implant or are otherwise lost. Should we regard that as an instance of infant mortality? And if so, why are we not mounting ambitious public health campaigns to try to save and rescue all of the fertilized eggs that are lost in natural pregnancy? We would need a public health campaign of massive proportions if there really were over a fifty percent rate of infant mortality.

Economics has increasingly become the science of human behavior in general, and it's all the more unlikely to think that it can possibly be value-free - and, in fact, it isn't. Economics rests on un-argued assumptions that need to be examined.