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[Dec 19, 2017] Do not Underestimate the Power of Microfoundations

Highly recommended!
Nice illustration of ideologically based ostrakism as practiced in Academia: "Larry [Summers] leaned back in his chair and offered me some advice. I had a choice. I could be an insider or I could be an outsider. Outsiders can say whatever they want. But people on the inside don't listen to them. Insiders, however, get lots of access and a chance to push their ideas. People - powerful people - listen to what they have to say. But insiders also understand one unbreakable rule: they don't criticize other insiders."
Notable quotes:
"... A more probable school of thought is that this game was created as a con and a cover for the status quo capitalist establishment to indulge themselves in their hard money and liquidity fetishes, consequences be damned. ..."
"... The arguments over internal and external consistency of models is just a convenient misdirection from what policy makers are willing to risk and whose interests they are willing to risk policy decisions for ..."
"... Mathematical masturbations are just a smoke screen used to conceal a simple fact that those "economists" are simply banking oligarchy stooges. Hired for the specific purpose to provide a theoretical foundation for revanschism of financial oligarchy after New Deal run into problems. Revanschism that occurred in a form of installing neoliberal ideology in the USA in exactly the same role which Marxism was installed in the USSR. With "iron hand in velvet gloves" type of repressive apparatus to enforce it on each and every university student and thus to ensure the continues, recurrent brainwashing much like with Marxism on the USSR universities. ..."
"... To ensure continuation of power of "nomenklatura" in the first case and banking oligarchy in the second. Connections with reality be damned. Money does not smell. ..."
"... Economic departments fifth column of neoliberal stooges is paid very good money for their service of promoting and sustaining this edifice of neoliberal propaganda. Just look at Greg Mankiw and Rubin's boys. ..."
"... "Larry [Summers] leaned back in his chair and offered me some advice. I had a choice. I could be an insider or I could be an outsider. Outsiders can say whatever they want. But people on the inside don't listen to them. Insiders, however, get lots of access and a chance to push their ideas. People - powerful people - listen to what they have to say. But insiders also understand one unbreakable rule: they don't criticize other insiders." ..."
Apr 04, 2015 | Economist's View

Darryl FKA Ron -> pgl...

At the risk of oversimplifying might it not be as simple as stronger leanings towards IS-LM and kind are indicative of a bias towards full employment and stronger leanings towards DSGE, microfoundations, and kind are indicative of a bias towards low inflation?

IN general I consider over-simplification a fault, if and only if, it is a rigidly adhered to final position. This is to say that over-simplification is always a good starting point and never a good ending point. If in the end your problem was simple to begin with, then the simplified answer would not be OVER-simplified anyway. It is just as bad to over-complicate a simple problem as it is to over-simplify a complex problem. It is easier to build complexity on top of a simple foundation than it is to extract simplicity from a complex foundation.

A lot of the Chicago School initiative into microfoundations and DSGE may have been motivated by a desire to bind Keynes in a NAIRU straight-jacket. Even though economic policy making is largely done just one step at a time then that is still one step too much if it might violate rentier interests.

Darryl FKA Ron -> Barry...

There are two possible (but unlikely) schools of (generously attributed to as) thought for which internal consistency might take precedence over external consistency. One such school wants to consider what would be best in a perfect world full of perfect people and then just assume that is best for the real world just to let the chips fall where they may according to the faults and imperfections of the real world. The second such school is the one whose eyes just glaze over mesmerized by how over their heads they are and remain affraid to ask any question lest they appear stupid.

A more probable school of thought is that this game was created as a con and a cover for the status quo capitalist establishment to indulge themselves in their hard money and liquidity fetishes, consequences be damned.

Richard H. Serlin

Consistency sounds so good, Oh, of course we want consistency, who wouldn't?! But consistent in what way? What exactly do you mean? Consistent with reality, or consistent with people all being superhumans? Which concept is usually more useful, or more useful for the task at hand?

Essentially, they want models that are consistent with only certain things, and often because this makes their preferred ideology look far better. They want models, typically, that are consistent with everyone in the world having perfect expertise in every subject there is, from finance to medicine to engineering, perfect public information, and perfect self-discipline, and usually on top, frictionless and perfectly complete markets, often perfectly competitive too.

But a big thing to note is that perfectly consistent people means a level of perfection in expertise, public information, self-discipline, and "rationality", that's extremely at odds with how people actually are. And as a result, this can make the model extremely misleading if it's interpreted very literally (as so often it is, especially by freshwater economists), or taken as The Truth, as Paul Krugman puts it.

You get things like the equity premium "puzzle", which involves why people don't invest more in stocks when the risk-adjusted return appears to usually be so abnormally good, and this "puzzle" can only be answered with "consistency", that people are all perfectly expert in finance, with perfect information, so they must have some mysterious hidden good reason. It can't be at all that it's because 65% of people answered incorrectly when asked how many reindeer would remain if Santa had to lay off 25% of his eight reindeer ( http://richardhserlin.blogspot.com/2013/12/surveys-showing-massive-ignorance-and.html ).

Yes, these perfect optimizer consistency models can give useful insights, and help to see what is best, what we can do better, and they can, in some cases, be good as approximations. But to say they should be used only, and interpreted literally, is, well, inconsistent with optimal, rational behavior -- of the economist using them.

Richard H. Serlin -> Richard H. Serlin...
Of course, unless the economist using them is doing so to mislead people into supporting his libertarian/plutocratic ideology.

dilbert dogbert

As an old broken down mech engineer, I wonder why all the pissing and moaning about micro foundations vs aggregation. In strength of materials equations that aggregate properties work quite well within the boundaries of the questions to be answered. We all know that at the level of crystals, materials have much complexity. Even within crystals there is deeper complexities down to the molecular levels. However, the addition of quantum mechanics adds no usable information about what materials to build a bridge with.

But, when working at the scale of the most advanced computer chips quantum mechanics is required. WTF! I guess in economics there is no quantum mechanics theories or even reliable aggregation theories.

Poor economists, doomed to argue, forever, over how many micro foundations can dance on the head of a pin.

RGC -> dilbert dogbert...

Endless discussions about how quantum effects aggregate to produce a material suitable for bridge building crowd out discussions about where and when to build bridges. And if plutocrats fund the endless discussions, we get the prominent economists we have today.

Darryl FKA Ron -> dilbert dogbert...

"...I guess in economics there is no quantum mechanics theories or even reliable aggregation theories..."

[I guess it depends upon what your acceptable confidence interval on reliability is. Most important difference that controls all the domain differences between physical science and economics is that underlying physical sciences there is a deterministic methodology for which probable error is merely a function of the inaccuracy in input metrics WHEREAS economics models are incomplete probabilistic estimating models with no ability to provide a complete system model in a full range of circumstances.

YOu can design and build a bridge to your load and span requirements with alternative models for various designs with confidence and highly effective accuracy repeatedly. No ecomomic theory, model, or combination of models and theories was ever intended to be used as the blueprint for building an economy from the foundation up.

With all the formal trappings of economics the only effective usage is to decide what should be done in a given set of predetermined circumstance to reach some modest desired effect. Even that modest goal is exposed to all kinds of risks inherent in assumptions, incomplete information, externalities, and so on that can produce errors of uncertain potential bounds.

Nonetheless, well done economics can greatly reduce the risks encountered in the random walk of economics policy making. So much so is this true, that the bigger questions in macro-economics policy making is what one is willing to risk and for whom.

The arguments over internal and external consistency of models is just a convenient misdirection from what policy makers are willing to risk and whose interests they are willing to risk policy decisions for.]

Darryl FKA Ron -> Peter K....

unless you have a model which maps the real world fairly closely like quantum mechanics.

[You set a bar too high. Macro models at best will tell you what to do to move the economy in the direction that you seek to go. They do not even ocme close to the notion of a theory of everything that you have in physics, even the theory of every little thing that is provided by quantum mechanics. Physics is an empty metaphor for economics. Step one is to forgo physics envy in pursuit of understanding suitable applications and domain constraints for economics models.

THe point is to reach a decision and to understand cause and effect directions. All precision is in the past and present. The future is both imprecise and all that there is that is available to change.

For the most part an ounce of common sense and some simple narrative models are all that are essential for making those policy decisions in and of themselves. HOWEVER, nation states are not ruled by economist philosopher kings and in the process of concensus decision making by (little r)republican governments then human language is a very imprecise vehicle for communicating logic and reason with respect to the management of complex systems. OTOH, mathematics has given us a universal language for communicating logic and reason that is understood the same by everyone that really understands that language at all. Hence mathematical models were born for the economists to write down their own thinking in clear precise terms and check their own work first and then share it with others so equipped to understand the language of mathematics. Krugman has said as much many times and so has any and every economist worth their salt.]

likbez -> Syaloch...

I agree with Pgl and PeterK. Certain commenters like Darryl seem convinced that the Chicago School (if not all of econ) is driven by sinister, class-based motives to come up justifications for favoring the power elite over the masses. But based on what I've read, it seems pretty obvious that the microfoundation guys just got caught up in their fancy math and their desire to produce more elegant, internally consistent models and lost sight of the fact that their models didn't track reality.

That's completely wrong line of thinking, IMHO.

Mathematical masturbations are just a smoke screen used to conceal a simple fact that those "economists" are simply banking oligarchy stooges. Hired for the specific purpose to provide a theoretical foundation for revanschism of financial oligarchy after New Deal run into problems. Revanschism that occurred in a form of installing neoliberal ideology in the USA in exactly the same role which Marxism was installed in the USSR.
With "iron hand in velvet gloves" type of repressive apparatus to enforce it on each and every university student and thus to ensure the continues, recurrent brainwashing much like with Marxism on the USSR universities.

To ensure continuation of power of "nomenklatura" in the first case and banking oligarchy in the second. Connections with reality be damned. Money does not smell.

Economic departments fifth column of neoliberal stooges is paid very good money for their service of promoting and sustaining this edifice of neoliberal propaganda. Just look at Greg Mankiw and Rubin's boys.

But the key problem with neoliberalism is that the cure is worse then disease. And here mathematical masturbations are very handy as a smoke screen to hide this simple fact.

likbez -> likbez...

Here is how Rubin's neoliberal boy Larry explained the situation to Elizabeth Warren:

"Larry [Summers] leaned back in his chair and offered me some advice. I had a choice. I could be an insider or I could be an outsider. Outsiders can say whatever they want. But people on the inside don't listen to them. Insiders, however, get lots of access and a chance to push their ideas. People - powerful people - listen to what they have to say. But insiders also understand one unbreakable rule: they don't criticize other insiders."

Elizabeth Warren, A Fighting Chance

Syaloch -> likbez...

Yeah, case in point.

[Aug 01, 2014] John Brennan Faces Calls to Resign After CIA Admits to Spying on Senate Torture Probe

Notable quotes:
"... The White House is standing by Brennan, citing President Obama's "great confidence" in his leadership. But at least two members of the Senate Intelligence Committee, Democrats Mark Udall of Colorado and Martin Heinrich of New Mexico, are calling for his resignation. ..."
Aug 01, 2014 | Democracy Now!

The White House is standing by Brennan, citing President Obama's "great confidence" in his leadership. But at least two members of the Senate Intelligence Committee, Democrats Mark Udall of Colorado and Martin Heinrich of New Mexico, are calling for his resignation.

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