Been there. Hate it.
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Certainly worth asking. I must say that I can’t say.
Neo-classical economics, in some sense, can be thought of as pretty much what most economists utilize to do economics. Again, others may contradict me on this, and you can judge their arguments. Of course, there are more knowledgeable people than me, so caveat emptor.
It has been said, more-or-less correctly IMO, that the layperson thinks that there is disagreement in economics where most economists and certainty in economics where economists disagree. In neo-classical economics, the basic “unit,” the consumer, is built axiomatically. There are two very simple and general statements about her preferences, and these are made in precise logico-mathematical language. With these, and a couple assumptions about budgets for example, economists have created a series of mathematical if-and-only-if links proving that if a consumer has certain preferences, she will choose in a certain way; and if she chooses in a certain way, then she will have certain preferences. What they’ve done is used math to actually look inside a person’s head and (possibly) make definite conclusions.
Do people choose in this certain way? This is the first point of controversy. There is a growing body of experimental evidence suggesting that they do, to a fair approximation. Experiments on rats & pigeons find them to choose consistent with rationality. One study of some 140 subjects found the vast majority to choose not only consistent with rationality, but also so that to choose that way they must have been rational. Of the ones who didn’t, one or two minor changes brought them in line w/ rationality. There was only one subject who was irrational in an economic sense. I saw the choice set that they had to pick from, and those errors looked pretty understandable. If you wish, google for “experonomics,” and you will find two online journals whose contents are classroom experiments in economics. I think you’ll be impressed with the range of experiments that are being increasingly used as teaching tools to show students that what they’re learning isn’t Ivory Tower Crap.
The consumer is built up from there, adding assumptions like no lexicographic preferences. That is, a person won’t judge consumption with one particular item being the first choice. For example, there is a great car at a great price, but it doesn’t have cup holders vs. a lemon at a high price with cup holders. Someone who lexicographically prefers cup holders will take the lemon. We don’t even have such a strong preference for air; if we did, people would have done whatever they could to get out of L.A. and live in the country.
What we end up with are models built in tight, compactly reasoned mathematical statements from basic assumptions whenever possible. I think that neo-classical economics has more-or-less become synonymous with this sort of reasoning, and the growing experimental filed is just one more part of that. Personally, I think it is fair to say that neo-Keynesianism, rational expectations, monetarism, real business cycle, etc. have been more-or-less subsumed into this way of thinking. Moreover, I would bet that most economists would use these various tools as needed. And if one fails to deliver, the evidence, the assumptions, and the logic will addressed and improved, modified, or scrapped as needed.
To put it another way, I think that monetarism, neo-Keynesianism, etc. are all models in the same paradigm: Neo-classical economics. Others may disagree.
Austrian economics and Marxism are whole different paradigms. At the risk of getting myself beat up, Austrian economics is basically philosophy, and has completely abandoned, or never even tried to utilize, the scientific method. As gurus utilize Deepak Chopra, so politicians may utilize Austrian economics.
Marxism is dead, its zombie corpse cruelly paraded by those who don’t have olfactory receptors and are unable to smell the stench of death. To put another way, Marxism is to economics as Zeno is to motion. I’m sure there are some who will disagree with this assessment as well.
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It is certainly reasonable to ask if there are shifts in which models are best or most accurate. It wasn’t very long ago that unequal information was incorporated into economic models, and that caused an expansion of economic thinking with good results. Lemon laws being one example.
I would suspect that most fundamental shifts that are motivated by the real world will arise from the field of experimental economics rather than the U.S. or world economy as we see it. I’m trying very hard to think of things that are unexplained or contradict the current paradigm. I think that the information age really won’t cause any big theoretical shifts because it is just lowering costs and making information more easily available. I would suggest perusing Hal Varian’s web page, www.sims.berkeley.edu/~hal/ , and going to his links on articles and papers—the papers link does have many non-techical articles. You will find some interesting stuff, I’m sure. David Levine also has a rich site for information on game theory & intellectual property: http://levine.sscnet.ucla.edu/ .
I’m betting that regulation/de-regulation will be one of the richer sources for economic innovation. Market design is going to be affected by the results of this sort of stuff. There are also issues of choice and uncertainty that may be affected by real-world observations. E.g., a finance Ph.D. student once told me how nobody could yet explain why there is consistently a price overshoot for IPOs. Also, learning is a rich field of research. (I think you can find some papers on that under Levine’s recent papers link.)
But the trends in the news just aren’t the sort of things that cause problems. Out-sourcing, trade, etc. have been around for a long time and for most economists it is a settled issue. Economists might see protectionist & anti-out-sourcing arguments the same way that an evolutionary biologist may see young-earth creationist arguments. They are of about equal merit, and both are hopelessly out of date. The move away from manufacturing isn’t very ground-breaking: Unions have monopolies in the labor markets—give the entire computer software industry to Microsoft and tell me that we could expect great results; American secondary education is not up to par; the information age is making service jobs more productive and expanding the possibilities; more people are becoming better educated elsewhere in the world; other countries’ infrastructures are improving; I’m sure the list could go on.
So I just don’t see any real reason why the economic changes making headlines should affect economic theory. It’s economic theory that is ready to discuss, understand, & explain what is happening; but, people just want to believe what they want to believe. Economists don’t agree with them, therefore economics must change.
That’s my perspective, anyway. I’m sure there are plenty of qualified people who will disagree.