The advocates of free markets in all their versions say that crises are rare events, though they have been happening with increasing frequency as we change the rules to reflect beliefs in perfect markets. I would argue that economists, like doctors, have much to learn from pathology.We see more clearly in these unusual events how the economy really functions. In the aftermath of the Great Depression, a peculiar doctrine came to be accepted, the so-called “neoclassical synthesis.” It argued that once markets were restored to full employment, neoclassical principles would apply. The economy would be efficient. We should be clear: this was not a theorem but a religious belief. The idea was always suspect…Brad doesn't really state a position on all this, but explains the issue thusly:
There are, I think two lessons that can be drawn from big depressions. You can draw the Keynes lesson, which is also the Milton Friedman lesson, that if only you can stabilize the trend of aggregate demand (and compensate for externalities either through clever Pigovian taxes or ingenious Coaseian carving of property rights at the joints) then the competitive market system does absolutely fine. You can draw the Stiglitz lesson–which is that such a gross market failure in the large tells us that every single market everywhere in the world is probably riddled with smaller-scale market failures, and that comprehensive and detailed governmental structuring of institutions at every level–macro, mess, and micro–is necessary in order to properly promote the general welfare.Krugman basically says he is still a disciple of the synthesis:
The brand of economics I use in my daily work – the brand that I still consider by far the most reasonable approach out there – was largely established by Paul Samuelson back in 1948, when he published the first edition of his classic textbook. It’s an approach that combines the grand tradition of microeconomics, with its emphasis on how the invisible hand leads to generally desirable outcomes, with Keynesian macroeconomics, which emphasizes the way the economy can develop magneto trouble, requiring policy intervention. In the Samuelsonian synthesis, one must count on the government to ensure more or less full employment; only once that can be taken as given do the usual virtues of free markets come to the fore.....although with reservations:
It’s a deeply reasonable approach – but it’s also intellectually unstable. For it requires some strategic inconsistency in how you think about the economy. When you’re doing micro, you assume rational individuals and rapidly clearing markets; when you’re doing macro, frictions and ad hoc behavioral assumptions are essential.
I still think that the Keynes/Samuelson view is reasonable, although market imperfections loom larger in my mind than they used to. But these are not reasonable times …Waldman tends to lean towards the Stiglitz position:
So why is the Keynes-Friedman-Samuelson position unstable ? I note that on the questions of public policy where they all agreed, I tend to agree with them. However, I definitely do not believe in the neoclassical synthesis as described by Stiglitz. I don’t think that, even given full employment, markets are efficient. I tend to advocate leaving the market alone except for 1) redistribution from rich to poor 2) mandatory insurance is market insurance is prevented by the adverse selection death spiral 3) Pigouvian taxes to internalize externalities 4) aggregate demand management 5) Anti discrimination legislation and 6) I’m sure there are lots of other exceptions which don’t come to mind.Ok, with that background, what do I think of all of this?
I'm going to beg the question right up front and say, what the hell are we talking about here? When we ask the question of whether markets are efficient, there is an implied goal: are they efficient at doing what? In other words, what do we want the marketplace to do?
Frankly, I'm not certain there is consensus even on this basic point, whether among economists or in society as a whole.
Personally, I would describe the purposes of any economic system as (i) to produce or acquire goods and services, and (ii) to distribute the goods and services produced or acquired in a fair and equitable manner. At a minimum, the amount of goods and services produced should be sufficient ensure the survival of all members of the society. Ideally, the amount produced and the method of distribution should be sufficient to permit each member of society a minimum level of freedom. Because a person who must struggle merely to survive is a person who is not free.
I'll have more to say about this topic....
