Monday, February 28, 2011

Financial Literacy

In which @CJFDillow reacts to @TimHarford's column on financial literacy.


In his article Illiteracy Rules, Tim quotes a survey where only 7% of Americans knew which of two financial offers was more favourable. We might reasonably worry that such ignorance (Tim calls it financial illiteracy) might leave some of the remaining 93% vulnerable to economic exploitation.

Tim discusses two possible remedies - financial education and regulation. He points out that both remedies have had limited success, so he thinks we probably need both.

In his post Financial Illiteracy - What's the Problem? Chris points out that financial education can be counter-productive.

"For one thing, I fear that the cure here - even if there is one - might be worse than the disease. In some cases, a little learning is indeed a dang’rous thing because our confidence sometimes rises faster than our knowledge. Lessons in financial literacy might therefore increase people’s willingness to take on debt, in the belief that they can handle it."

This suggests the need for something we might call second-order intelligence - being smart enough to avoid trying to be too smart.

Tim's survey compared two possible choices for a purchaser - payment by instalments, or taking out a loan and paying the full sum at the end. Financially literate Americans should be aware of two further choices - paying a smaller amount upfront and not getting into debt at all, or deferring the purchase until you've saved the money. At the interest rates quoted in the survey, both of the choices offered in the survey look almost equally bad. (In which case, why waste time calculating which is worse?)

Chris asks what the real problem is. Is it that people are financially illiterate, or financially irrational, or just financially impoverished. If it's about irrationality, then Chris thinks what matters is not so much financial planning as character planning, and he remarks

"The problem is, though, that it's not obvious that capitalism can thrive if people stick to these principles."

If capitalism benefits from weak-willed consumers, as Chris implies, then the survey reinforces the capitalist agenda by implying that there are only two choices (payment by instalments or loan) and ignoring the choices that would be selected by more strongly willed consumers. Tim tells us to ask ourselves why companies are so keen to let us pay in instalments, as if that were evidence that this is the most profitable for them. (This is not necessarily the case, as payment by instalments probably involves greater transaction costs.) But surely the real reason is not because they would make more money from payments by instalments, but because they are keen to pander to our irrationality and give us as many ways as possible to buy things we cannot afford.

Friday, February 25, 2011

The Meaning of Odds

According to @CJFDillow (via @diane1859) "Paddy Power say there is twice as much chance of alien life being discovered this year as of Arsenal winning the quadruple: 40/1 vs 80/1"

Chris's interpretation of the odds offered by bookmakers such as Paddy Power is that they reflect the subjective probability of certain events - either as determined by the bookmakers themselves or as determined by "the wisdom of crowds".

But I prefer to think that these odds merely reflect a lower elasticity of demand on silly wagers, indicating the irrationality of those who bet on such events. Perhaps Paddy Power reckons that the number of people betting on aliens is likely to be largely unaffected by the odds (economists call this an inelasticity of demand), in which case there is no incentive for the bookmakers to offer more favourable odds, or even to devote much effort to calculating more accurate odds.

Thursday, February 10, 2011

Understanding pain

Many of us have a compulsion to look away during a painful event such as an injection. But scientists have found that looking at your body can reduce the amount of pain you experience.


Source: Flavia Mancini, Matthew R. Longo, Marjolein P.M. Kammers and Patrick Haggard, "Visual Distortion of Body Size Modulates Pain Perception" Psychological Science February 8, 2011 doi: 10.1177/0956797611398496 via Rebecca Morelle "Pain reduced by changing what you look at" BBC News 10 February 2011.

One way to understand this phenomenon is to understand the purpose of pain - as a signal. If you are looking at your arm, your brain is getting visual information about what is happening to your arm, so it doesn't need to pay so much attention to other sensory information. Therefore you feel less pain.

The researchers also found that this effect could be increased if the hand was magnified to make it appear larger, thus cutting pain levels further still.

To the extent that pain has a natural purpose, there is something problematic about conventional attempts to suppress pain, such as pain-killing drugs. We may note that the drugs often get less effective over time, as if the body is reasserting its need for information. The POSIWID principle explains why it's difficult to permanently suppress those symptoms that reflect an inherent purpose. (Some might argue that all symptoms reflect some purpose.) However, if we offer the system an alternative way of fulfilling the purpose - an alternative information channel - then the symptom can be attenuated without frustrating its purpose.