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Nobel Symposium On Coin Together With Banking 24-Hour Interval 2

last post covered Day 1 on banking.)

Bernanke

Sadly Ben Bernanke's video as well as slides are non upwards on the website. Ben showed some really interesting prove that the crisis was an unpredictable run, rather than the usual story well-nigh predictable defaults resulting from also much credit. Things actually did acquire all of a abrupt a lot worse inwards September as well as Oct 2008. Yes, it's tardily to tell this is defense forcefulness against the accuse that he should receive got done to a greater extent than ahead of time. But prove is evidence, as well as I let on it quite plausible that the relatively modest losses inwards subprime demand non receive got caused such a massive crisis as well as recession absent a run. Ben says the fabric is work of a newspaper he volition liberate soon, so aspect for it. One tin sympathise that Bernanke is careful well-nigh releasing less than perfect drafts of papers as well as videos.

History

Barry Eichengreen gave a scholarly line organisation human relationship of why history matters, especially the non bad depression, as well as nosotros should pay to a greater extent than attending to it. (Paper, video.) He aimed squarely at typical economists whose cognition stopped at Friedman as well as Schwartz, or possibly Ben Bernanke's famous non-monetary channels paper, inwards which banking concern failures propagated the depression. He emphasized the work of the aureate measure as well as international cooperation or non-cooperation, as well as warned against facile comparisons of the aureate measure sense to today's events as well as the euro inwards particular.

Randy Kroszner has a non bad laid of slides and an engaging presentation. He also started on parallels amongst the non bad depression, as well as told good the story of the the States default on aureate clauses. He closed amongst a alarm well-nigh fighting the final state of war -- specially apt given the exclusive focus of most of this conference on the events of 2008 -- as well as on how to start a crisis. In his sentiment when Bank of England Gov Mervyn King said: “We volition back upwards Northern Rock." People hear "Northern Rock's inwards trouble? Run!" Likewise, inwards my view, speeches past times President Bush as well as Treasury Secretary Paulson did a lot to spark the run inwards the US.

DSGE

H5N1 highlight for me, was the session on DSGE models.

Marty Eichenbaum (video, slides, subsequent paper) gave a dainty review of the electrical flow status of novel Keynesian DSGE models, as well as how they are developing inwards reaction to the financial crisis as well as recession, as well as the null jump episode.

Harald Uhlig

Critiques, or to a greater extent than exactly lists of outstanding puzzles as well as challenges, are often to a greater extent than memorable as well as novel than positive summaries, as well as Harald Uhlig delivered a clear as well as memorable one. (Video, Slides)


Asset prices are a longstanding job inwards DSGE models. In typical linearized form, the quantity dynamics are governed past times intertemporal substitution, as well as the asset prices past times conduct chances aversion, as well as neither has much influence on the other. (I learned this from Tom Tallarini.) Rather obviously, our recent recession was all well-nigh conduct chances aversion -- people stopped consuming as well as investing, as well as tried to displace from person to authorities bonds because they were scared to death, non a abrupt laid on of thriftiness. There is a lot of electrical flow operate going on to examine to repair this deficiency, but it nonetheless lives inwards the province of extensions of the model rather than the mainstream. Harald also points out a oft ignored implication of Epstein-Zin utility, the utility index reflects all consumption as well as anything that enters utility

Financial frictions are blossoming inwards DSGE models, inwards 2 forms: First, HANK or "heterogenous agent" models, which add together things similar borrowing constraints as well as uninsurable risks so that the distribution of income matters, as well as inwards an eternal quest to brand the models operate to a greater extent than similar static ISLM. Second, inwards response to the financial crisis (see outset day!) stylized models of banking as well as intermediary finance are showing up. I'm nonetheless a lilliputian puzzled that the to a greater extent than measure time-varying conduct chances aversion work of macro-finance got ignored, (a plea here) but that is indeed what's going on.

The conundrum, hither equally elsewhere inwards DSGE, is that the to a greater extent than people play amongst the models, the farther they acquire from their founding philosophy: macro models that practice verbalize well-nigh monetary policy, (now) financial crises, but that obey the Lucas rules: Optimization, budget constraints, markets, or, to a greater extent than deeply, structures that receive got some hope of beingness policy invariant as well as thus predictions that volition hold out the Lucas critique. Already, many ingredients such equally Calvo pricing are convenient parables, but questionably realistic equally policy-invariant.

Harald points out that since most of the frictions are imposed inwards a rather ad-hoc manner, neither volition they live policy-invariant. This is a deeper as well as to a greater extent than realistic shout out for than ordinarily realized. Every fourth dimension marketplace participants hitting a "friction," they tend to nowadays a agency around that friction so it doesn't wound them adjacent time. Regulation Q on involvement rates was in 1 trial a "friction," as well as so the coin marketplace fund was invented. The resultant is also often "chicken papers:"


The understandable problem is, if you lot examine to microfound every unmarried friction from Deep Theory -- simply why it is that credit carte companies set a boundary on how much you lot tin borrow, inwards terms of asymmetric information, moral hazard, as well as so forth -- the audience volition live asleep long earlier you lot acquire to the data. Also, equally nosotros saw inwards twenty-four threescore minutes flow 1, at that spot is (to set it charitably) a lot of incertitude inwards simply how contract or banking theory maps to actual frictions. I mean value we're stuck amongst ad-hoc frictions, if you lot want to acquire that route.

Harald's adjacent shout out for is, I think, his most devastating, equally it describes a huge hole inwards electrical flow models that is non (unlike the final two) a shout out for of immense electrical flow inquiry effort. The Phillips bend as well as inflation are the fundamental shout out for of the New Keynesian DSGE model -- as well as a disaster. 

The Phillips bend is central. The shout out for of the model is for monetary policy to receive got output effects. Money itself has (rightly) disappeared inwards the model, so the only channel for monetary policy to operate is via the Phillips curve. Interest rates alter inflation, as well as inflation causes output changes. No surprise, it is really difficult for that model to create anything similar the final recession out of modest changes inwards inflation. (I receive got to grip hither amongst the premise of the financial frictions sentiment -- if you lot want your model to create the final recession, other than past times 1 huge shock, the model needs something similar a financial crisis.)

The Phillips bend inwards the information is good known

Less good known, but worth lots of attention, is how the now measure DSGE models completely neglect to capture inflation. Harald's slide:



The shout out for of the slide, inwards simpler form: The measure Phillips bend is

inflation today = beta x expected inflation adjacent yr + kappa x output gap  + shock

Essentially all inflation is accounted for past times the shock. The model is basically still well-nigh the source of inflation. Looking at the model equally a whole, non simply 1 equation, Neither monetary policy shocks nor changes inwards rules accounts for whatsoever pregnant amount of inflation. 

I made a similar graph recently. Use the measure iii equation model
Now, work actual information on output y, inflation pi, as well as involvement charge per unit of measurement i, to dorsum out the shocks v. Turn off the monetary policy daze vi = 0. Solve the model as well as plot the information -- what would receive got happened if the Fed had exactly followed the Taylor rule? 



Answer: Inflation as well as output would receive got been virtually the same. The inflation of the 1970s as well as its conquest inwards the 1980s had aught to practice amongst monetary policy mistakes. It is only the fault, as well as so fortunate consequence, of "marginal cost" shocks that come upwards from out of the model. This is a pretty uncomfortable prediction of a model designed to live well-nigh monetary policy! Or, equally Harald set it

  • Data: no Phillips-Curve tradeoff.
  • QDSGE: don’t line organisation human relationship for inflation amongst monetary policy shocks.
  • The NK / Phillips-Curve-based NK QDSGE models may thus provide a piteous guide for monetary policy.

Wait, you lot ask, what well-nigh Marty Eichenbaum's pretty graphs, such equally this one, showing the effects of a monetary policy shock?
The answer: After a lot of work, the effects of a monetary policy shock look (at last) well-nigh similar what Milton Friedman said they should aspect similar inwards 1968. But monetary policy shocks don't line organisation human relationship for whatsoever but a tiny work of output as well as inflation variation, quite contra Friedman (and Taylor, as well as many others') view.

Last, measure novel Keyensian DSGE models receive got potent "Fisherian" properties. In response to long lasting or expected involvement charge per unit of measurement rises, inflation goes up. More on this later.

Ellen McGrattan

Ellen stole the show. (Slides.) Take a break, as well as watch the video. She manages to live hilarious as well as incisive. And dissimilar the balance of us, she didn't examine to sheohorn a 2 threescore minutes lecture into her fifteen minutes.

Her fundamental points. First, similar Harald, she points out that the models are driven past times large shocks amongst less as well as less plausible structural interpretation, as well as thus farther from the Lucas critique solution than in 1 trial appeared to live the case. The shocks are actually "wedges," deviations from equilibrium weather condition of the model amongst unknown sources

What to do? Focus on rules as well as institutions. This is a deep point. Even DSGE modelers, inwards the want to speak to policy makers, often adopt the static ISLM presumption that policy is well-nigh actions, well-nigh decisions, whether to heighten or lower the funds rate. The other large Lucas shout out for is that nosotros should mean value well-nigh policy inwards terms of rules as well as institutions, non simply actions.


Monetary policy as well as ELB

Stephanie Schmitt-Grohé (slidesvideo)  talked well-nigh the Fisherian possibility -- that raising involvement rates raises inflation. New-Keynesian DSGE models, amongst rational expectations, receive got this property, especially for permanent or preannounced involvement charge per unit of measurement increases, as well as when at null involvement rates or otherwise inwards a passive regime where involvement rates practice non react to a greater extent than than 1 for 1 amongst inflation. She as well as Martin Uribe receive got been advocating this possibility equally a serious proposal for Europe as well as Nihon that want to heighten inflation.

She presented some dainty prove that permanent increases inwards involvement rates practice increment inflation -- as well as correct away, non simply inwards the long run.


Mike Woodford. (slides, video)  gave a dense verbalize (37 slides, 20 minutes) on policy at the lower bound. During the ELB, fundamental banks moved from involvement rates to asset purchases as well as forrard guidance. Mike asks,
To what extent does this hateful that the entire conceptual framework of monetary stabilization policy needs to live reconsidered, for a basis inwards which ELB powerfulness good maintain periodically to bind? 
In classic form, Mike sets the query upwards equally a Ramsey problem. Given a DSGE model, what is the optimal policy, given that involvement rates are occasionally constrained? He derives from that job a toll story target. The toll story target works, intuitively, past times committing the fundamental banking concern to a flow of extra inflation after the null jump ends. It is a pop shape of forrard guidance. The excogitation hither is to derive that formally equally an optimal policy problem.

Mike's toll story target is stochastic, changing optimally over fourth dimension to respond to shocks. I'm a lilliputian skeptical that the fundamental banking concern tin let on as well as sympathise such shocks, especially given the higher upwards Uhlig-McGrattan give-and-take well-nigh the nature of shocks. Also, equally I emphasize inwards comments, I'm dubious well-nigh the non bad powerfulness of promises of what the fundamental banking concern volition practice inwards the far hereafter to cause output today. I'm a fan of toll story targets, but on both sides, non simply equally stimulus, but for utterly different reasons.

Mike takes on rather skeptically the mutual choice -- quantitative easing, asset purchases during the fourth dimension of the bound. He points out that to work, people receive got to believe that the increment inwards coin is permanent, as well as won't live rapidly withdrawn when the null jump is over. As evidence, he points to Japan:



Similarly, he likes the toll story target over forrard guidance -- speeches inwards house of activity -- equally it is a to a greater extent than credible commitment to practice things ex-post that the banking concern may non wishing to practice ex-post.

Finally, he addresses the puzzles of novel Keynesian models at the null jump -- forrard guidance has stronger effects the farther inwards the hereafter is the promise; effects acquire larger equally prices acquire less sticky, as well as so on. He argues that models should supervene upon rational expectations amongst a complex k-step iterated expectations rule.

Me.

Video, slides from Swedenslides from my webpagewritten version. I covered this inwards a previous weblog post, so won't repeat it all. I set a lot of endeavor inwards to it, as well as it summarizes a lot of what I've been doing inwards fifteen minutes flat, so I recommend it (of course). It also offers to a greater extent than perspective on higher upwards points past times Mike as well as Stephanie. My favorite line, referring to Mike's force for irrational expectations is something closed to
"I never thought nosotros would come upwards to Sweden, that I would live defending the basic new-Keynesian program, as well as that Mike Woodford would live trying to tear it down. Yet hither nosotros are. Promote the financial equation from the footnotes as well as you lot tin salve the rest." 
Emi Nakamura

Poor Emi had to acquire final inwards an exhausting conference of jet-lagged participants. She did a non bad project (video, slides) roofing a century of monetary history as well as monetary ideas clearly as well as transparently. These are non bad slides to work for an undergraduate or MBA degree on monetary policy, equally well. An abbreviated list:

  • Gold standard
  • Seasonal variation inwards involvement rates nether the aureate standard; coin demand shocks
  • Money demand shocks inwards the 1980s -- how the supposedly "stable" V inwards MV=PY vicious apart when the Fed pushed on M.

  • Theoretical instability / indeterminacy of involvement charge per unit of measurement targets
  • The switch to involvement charge per unit of measurement targets as well as corridors inwards operating procedures
  • The (near-miraculous) success of inflation targets
  • Taylor rules as well as other theory of determinate inflation nether involvement charge per unit of measurement targets
  • How is it "monetary economics" without money?
  • Why did immense QE non motility inflation? 
The overarching subject is the grand story of a move, intellectual as well as practical, from coin render targets (of which aureate is one) to involvement charge per unit of measurement targets.

Postlude

Mon featured 2 panels, Macroeconomic inquiry as well as the financial crisis: H5N1 critical assessment, amongst Annette Vissing-Jørgensen, Luigi Zingales, Nancy Stokey, as well as  Robert Barro ; and Banking as well as finance inquiry as well as the financial crisis: H5N1 critical assessment amongst Kristin Forbes, Ricardo Reis, Amir Sufi, as well as Antoinette Schoar.

Perhaps it's inwards the nature of panels, but I flora these a disappointment, especially compared to the stellar presentations inwards the primary conference. Also I mean value it would receive got been amend to allow to a greater extent than (any, really) audience questions; the whole conference was a chip disappointing for lack of full general discussion, especially amongst such a stellar group.

In particular, Luigi led past times excoriating the profession for non paying attending to housing problems as well as financial crises. I thought this a chip unfair as well as simultaneously short-sighted. He singled out monetary economic science textbooks, including Mike Woodford's, for omitting financial crises. Well, Mike omitted asteroid impacts too. It isn't a volume about financial crises. And, after lamabasting all of us, he said non 1 intelligence well-nigh events since 2009. What are nosotros missing now? I had to stand upwards up as well as enquire that rude question, in 1 trial again suggesting that possibly nosotros are all non listening to Ken Rogoff this time. Annette went on to enquire something similar "don't you lot Chicago people believe inwards whatsoever regulation at all," as well as the respondents were also polite to tell what an unproductive query that is as well as simply displace on.

Again, I offering apologies to authors as well as discussants I didn't acquire to. The whole thing was memorable, but at that spot is only so much I tin blog! Do acquire to the site as well as aspect at the other sessions, according to your interests.


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