I heard an interesting tidbit this morning on the radio discussing a fairly 'easy' way to reduce long term entitlement spending. It had to do with the cost of living adjustments are made in indexing benefits (e.g. pensions) as well as tax brackets. The chap was arguing that current inflation indexing is tied to the overall consumer price index. They challenged this and suggested that the CPI does not take substitution effects into account, and thus systematically overestimates US inflation. The upshot is that if you were to switch to a chained CPI (which attempts to account for substitution), entitlements would grow slower in the long run. The initial change wouldn't be much, but it would add up over time, and is a fairly low-pain way to work towards deficit reduction in the long run. They interviewed some AARP spokesperson, who was obviously upset at the very idea, and suggested that COLA were too low to start with, since spending by the elderly was already outpacing inflation, given its heavy weighting to healthcare spending (some benefits are currently indexed to wage growth rather than inflation anyways, which tends to be much more expensive than CPI targeting. I think this is just a bad idea all around).
The specifics of this debate are largely irrelevant, but it got me thinking about the way in which inflation estimates are produced, and what measure of inflation is most useful for automatically indexation. (Note that I think this is irrelevant from a monetary policy perspective - IMO core CPI is more than adequate for guiding monetary policy.) On the one hand, I get the argument for the chained CPI supporters - if we will readily substitute for cheaper goods, why shouldn't that be a reflection of our actual spending? In some ways, this seems like just a logical extension of the conclusions drawn by the Boskin Commission in the mid-1990s (the conclusions of which led to a revamp in the way hedonics/etc. work in adjusting CPI numbers). In the recession, many households moved to store-brand items instead of brand-name items, saving significant amounts of money with little change in quality - shouldn't this be factored into inflation baskets? On the other hand, I think that it can be problematic - if we adjust entitlements to chained CPI, we will be progressively pricing benefits recipients out of various higher price markets to substitute to a lowest common denominator. To be fair, though, substitution can work both ways - if there's a sudden shortage of chickens (and thus price increases), more people will buy beef even if it's more expensive on an absolute basis, something chained CPI should account for. I am also somewhat concerned about the complexities associated with accurately determining substitution behavior. An interesting side-effect is that with hedonics and substitution fully incorporated, you actually see more significant US wage growth over the last few decades, suggesting that perhaps overall 'quality of life' has in fact improved more than we realize. It's hard to account for the effects of new product classes and rapid improvements in quality we've seen in the last few decades, and perhaps current CPI measures have indeed been underestimating our buying power.
There are other significant concerns with CPI as used for indexation. The value of homes is fairly volatile over a long period compared to other inflation measures, so housing is priced by the cost of equivalent renting cost (which has smoother changes), even if a large proportion of American households own their homes and pay mortgages. This can result in systematic over- and under-estimation of inflation, depending on which way the housing market is going. Now, the major group of people who have mortgages are spending a big chunk of their income on their household, and thus tax rules on income brackets and deductions/exemptions will be skewed compared to the rest of the population if housing inflation is over or underestimated. Similarly, there is the issue with two other big chunks of spending that outpace inflation by a big chunk: college/graduate studies and healthcare. Those chunks of the population who spend a lot of their money on either (the young and the old) are experiencing much higher inflation than the CPI.
This 'granularity' we see - where certain chunks of the population are experiencing cost of living this is either significantly higher or lower than that estimated by CPI - makes it very challenging to design appropriate indexation policy for benefits and taxes. I believe this is a different issue than the substitution effects mentioned above, which apply to everyone more or less equally, but it's also a challenging policy question. These changes are not trivial - they can easily amount to a double-digit percentage difference between what the government thinks you're spending for an average life compared to what you actually spend. What should we do?
On the question of substitution, I think a case can be made for indexing benefits to chained CPI. If normal market behavior results in changes in spending, I'm not too troubled if government benefits change in accordance with that behavior. Presumably as the BLS gets more and more sophisticated in their inflation models, they will be able to more accurately represent what an actual person in spending.
On the question of granularity, though, I think it's hard to see an effective policy that would replace CPI or chained CPI. Some people have suggested having different inflation measures apply for different programs - for example, using a healthcare-heavy inflation measure for programs targeting the elderly, and a housing price (not rent)-heavy measurement for the middle aged, and a education-heavy measure for programs targeting the young. Yet this seems needlessly complex, and a blunt instrument to boot. I believe Dread brought up a similar question on granularity a while back, but referencing tax brackets varying with geography. I opposed taking into account local cost of living then, and I think I oppose taking into account 'local' cost of living here. There, the arguments were a bit more clear-cut - after all, you can always move to a cheaper area, meaning you are make a choice. Here it's not as clear-cut (yes, there are choices for cheaper healthcare and education, but even 'cheaper' options are outpacing inflation; housing is a bit easier to argue about, though). Do any of you have suggestions on how to deal with this? Do other governments have clever inflation indexation schemes to get around these problems?


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