Saturday, December 27, 2008

"Paradoxically (and inconsistent with expected value), ambiguity preceding a terrible outcome might be worse than the outcome itself"

From the Edge:


"BRIAN KNUTSON
Psychologist, Stanford University

WHEN WAITING IS THE HARDEST PART

How might the psychology of individuals matter in today's market?

Herbert Simon famously proposed that individuals suffer from "bounded" rationality— they can't attend to or remember everything all the time. Thus, far from optimizing, people muddle through decisions and "satisfice" instead. However, bounded rationality might only add noise, and needn't systematically bias people's risk preferences. On the other hand, recent theorists have argued that anticipatory emotional states (e.g., fear, excitement) can bias peoples' risk preferences(AS IS HAPPENING NOW ), and have begun to develop tools that allow them to test their claims.

For instance, neuroeconomists—including a motley crew of economists, psychologists, neuroscientists, and others—study how the brain makes decisions. Neuroimaging techniques have advanced over the past ten years such that they now allow scientists to track second-to-second changes in the activity of deep subcortical regions. This means we can examine activity in regions of the brain implicated in emotion not only after a decision has been made, but also during and even prior to the decision.

What have these fancy techniques revealed so far? First, the brain responds to uncertain future outcomes in a specific region (i.e., the anterior insula), and ambiguity (not knowing the probabilities of uncertain outcomes) provokes even greater activation in this same region. Further, insular activation precedes risk avoidance in investment tasks, and is even more pronounced before people "irrationally" avoid risks (i.e., or violate the choices of a risk-neutral, Bayesian-updating "rational" actor). Inflict enough ambiguity on enough people and you can immediately sense that they might lean towards risk aversion( IN THIS, I AGREE WITH JOHN TAYLOR. I'M JUST SAYING THAT THE MAIN AMBIGUITY ABOUT THE STRENGTH AND SCOPE OF THE GOVERNMENT GUARANTEES WERE TRIGGERED BY LEHMAN. THE RIPPLE EFFECT OF THE FEAR AND AVERSION TO RISK AND ACCOMPANYING FLIGHT TO SAFETY TOOK SOME TIME TO RIPPLE THROUGH TO OTHER PARTS OF THE ECONOMY AND MARKETS. ).

What are some implications of these findings for the current crisis? Presently, we need to put a price on ambiguous derivatives (a job for the economists). As long as the value of these contracts remains unresolved, this could generate ultra-uncertainty, which will promote fear, which will keep money in peoples' mattresses and out of the market( TRUE ). In the future, we should regulate (or incentivize)( I PREFER INCENTIVIZE AND SUPERVISE ) against contracts that resist pricing( ILLIQUIDITY ).

Paradoxically( AS I'VE SAID, PARADOX IS BASIC TO HUMAN EXISTENCE AND TO A HUMAN AGENCY EXPLANATION AND NARRATIVE THINKING ) (and inconsistent with expected value), ambiguity preceding a terrible outcome might be worse than the outcome itself( YES ). This could apply to derivatives or any dangerous scenario. Imagine teetering on the edge of a cliff in broad daylight. You look down to see a river running over rocks 100 meters below. Now imagine teetering on the edge of another cliff in the dead of the night. You peer down into a void. Which do you prefer?"

This is a terrific post. It explains exactly what has been going on since the Lehman Bankruptcy. Not understanding the consequences of inserting mass and systemic ambiguity into our economic system is the main cause of our crisis. We certainly had problems in our economy, but as Brad DeLong has shown, the amount of money these problems added up to do not warrant the virulence of the response. Only a Human Agancy Explanation, such as the one above, can do that.

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