Thursday, January 29, 2009

It's because crass materialism leads to a bigger Keynesian multiplier.

From Nick Rowe:

"
In defence of crass materialism (temporarily)

Economists are sometimes accused of crass materialism. Normally I would plead innocent, and accuse the accuser of misunderstanding economics. But right now I am in favour of crass materialism. I want government investments which yield a monetary return. Government investments which make people happy but bring in no cash aren't as good right now. And it's not because "people are short of cash right now, and can't afford art galleries". It's because crass materialism leads to a bigger Keynesian multiplier.

Suppose we have a choice between spending $100 on building a new bridge or on building a new sculpture. The bridge will bring in money, either by charging tolls, or by increasing people's incomes. The sculpture won't bring in any money, because people will be able to see it for free, and won't increase anyone's income. But people will enjoy seeing it.

Normally, like any good economist, I would say that it makes absolutely no difference that one investment brings in money and the other doesn't. The only purpose of money is to buy things that we want (that give us utility). If we get more utility indirectly from the bridge than we get directly from the sculpture, then build the bridge. But if the sculpture brings us more utility than the bridge, build the sculpture. Money income is only a means to an end.

But right now it's different. Forget the sculpture; build the bridge. The bridge will have a bigger fiscal multiplier than the sculpture. The bridge will cause a bigger increase in aggregate demand.

Suppose the investment will be financed by increased taxes. $100 spent on construction means $100 extra demand. But $100 extra taxes will reduce disposable income by $100, and reduce consumption by (say) $80. So the immediate (first round) effect will be a net $20 increase in demand. That's correct for the sculpture, but it's incorrect for the bridge. The bridge will also increase future incomes, once it's built. When people expect an increase in their future income, they usually consume more now and save less. The increased consumption from the increased future income will offset some, or maybe all, or maybe more than all, of the drop in consumption from increased taxes.

Or suppose the investment is financed by government borrowing. Both bridge and sculpture create an immediate $100 increase in demand. But if people expect higher future taxes to pay for the government debt, they expect their future disposable incomes to be lower, so they consume less now. That drop in consumption partly offsets the $100 increase in demand, so the immediate (first round) effect will be less than $100. That's correct for the sculpture, but incorrect for the bridge. If the government collects tolls from the bridge, it won't have to increase taxes as much. If the tolls pay the full borrowing costs, taxes won't need to increase at all, so consumption won't decrease now.

It's about the same if the government doesn't collect tolls, but the bridge increases people's incomes. The increase in future income from the bridge will offset the increased future taxes at least partly, maybe fully, or more than fully. So future disposable income won't fall as much, and might even rise. So current consumption won't fall as much, and might even rise.

Either way, whether financed by taxes or by borrowing, $100 spent on building the bridge will have a bigger effect on aggregate demand than $100 spent on building the sculpture. And that's what we need, in these abnormal times. Once the abnormal times are over, and aggregate demand is no longer the problem, we economists can renounce crass materialism, and return to our good old spiritual natures.

[If you are uneasy about this conclusion, because you see the sculpture as giving "psychic income", think of it this way: is the psychic income from the statue a perfect substitute for the material goods you buy with money income? If it is, so that $1 equivalent of psychic income causes the marginal utility of consumption to fall by the same amount as $1 of money income, then $1 of psychic income will have exactly the same effect on current savings as $1 of money income. In this case, the bridge and the sculpture are the same. But it seems much more plausible that the sculpture would be a very imperfect substitute for the consumption goods that money can buy, and would have little or no effect on the marginal utility of future consumption.]

And me:

Nick,

I don't credit the saving for future taxes argument as well. Everyday we make decisions and plans based on any number of conflicting desires, needs, etc. Some people might save for a tax, or they might save for other reasons. Whether you follow Quine or Wittgenstein you will have problems separating out motives and causes. I'm not saying it doesn't make some sense, but I don't see a straight line of cause and effect.

One argument put forth for infrastructure spending now, in a downturn, is that we are likely to get better terms on our infrastructure contracts at present. I'm a bit bothered by trumpeting this argument because it makes it sound as if we need recessions to improve the efficiency of government spending.

I completely agree with the point about infrastructure investment needing to be just that. However, as I said in your last post, I would market it differently. I'm a fan of the new Trust Index approach( I'd like your views Nick ):

http://blogs.wsj.com/economics/2009/01/28/trust-troubles/

Right now, trust in government is actually falling. In the US, it's hard to sell government spending as competent. Consequently, I'd use different arguments, like trust in our future.Trust in doing things together with our taxes.This can help overcome doubts about competence. However, even if they'll make a pig's breakfast of the spending, it has to also be sold, truthfully, as an attempt to invest in our future. Just telling people we're handing out money for whatever, as if the money acts mechanically, isn't a way to inspire trust. It signals insincerity.

Also, I might note the following:

http://www.nytimes.com/2008/12/27/opinion/27lyubomirsky.html?_r=2&ref=opinion

I feel that, in a downturn, selling communal projects as just that is an easier task.

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