RP Indeed - and that started, I don't know, six or seven years after I finished my PhD, originally, I was more a microeconomist.
LB For readers who might not know the difference, could you explain — in everyday terms — what macroeconomics and microeconomics are, and how they connect?
RP Microeconomics is about how markets work and how individual decisions are made. Macroeconomics is about the big aggregates; money flows, budgets, fiscal policy, tax. It might be a financial crisis, for example. It might be a big tax increase, it might be a big budget programme. How does the economy respond to these stimuli, shocks, and so forth? That's a good part of macroeconomics.
LB Economists often talk about the ‘value’ of things, but how do you, personally, think about the value of time.
RP We economists are very conscious of the value of time .What are people willing to give up for an hour’s time?
If you look, for example, at HS2, if you must, as we must look at HS2, sadly. One of the original justifications was attempting to value in cash the amount of time that would be saved as a result of putting this faster connection in. To do that, obviously, you estimate how much faster you can get from Euston to Birmingham, and second, you value how much each of those minutes is worth to a representative individual and multiply that by the number of people … we do that sort of stuff all the time. It is part of what we call cost-benefit analysis, and you try to estimate the value of time saved. Another application might be how do you value the amount of time, months, years that can result from a medical advance in terms of life hours saved.
But you must also be thinking about what those hours cost. What's the value of an additional hour of life? There are various ways to try to pursue that, but it's an important question.
LB Do you have an answer?
Oh, no, I don't. - not at all. What would I - you can ask people, what would you be willing to pay now for an extra year of life? What of your current income, or assets, would you be willing to sacrifice to add one year to your life?
LB And when you ask that question, are you quantifying it with a quality?
RP Yes, of course, and the next step to a question like that is, how many years of healthy life you have. And this is something that people are becoming more and more sensitive to, more preoccupied with, yes, we are extending longevity but what is the quality of those extra years? And end of life care is now very expensive. It's very complex.
But again, it's part of the value of time, right? .