Archive for the ‘paul krugman’ Category

Paul Krugman would have been a good game designer

Sunday, May 24th, 2009

Back in the 1990s, I enjoyed programming some games for myself and friends to play. Once the game existed, and we’d played it a few times, we’d start asking, “How would the game change if we changed X?”

Via Brad Delong, I stumble upon this oddly simple economic model from Paul Krugman:

But if the money supply is constant, M’ = M; also, C = L. Given the utility function, consumers will spend a share 1-s of their initial wealth on goods, s on money. So we can represent equilibrium either by the condition that demand for goods equal supply,

L = (1-s)(L + M/P)

or by the condition that demand for money equal supply,

M/P = s(L + M/P).

Both ways of looking at it imply the price-level equation

P = [(1-s)/s)](M/L)

so the price level is proportional to the money supply.

If he’d flunked out of economics school, he could have done a lot to improve SimCity.

Paul Krugman asks a boring question, seeks a boring answer

Monday, January 19th, 2009

I usually like Paul Krugman’s writing a great deal, so I’m disappointed with his sarcastic take on job creation under President Bush.

He points to this graph to show the weakness of job creation:

Job creation under Bush

and he asks:

Why were the last 8 years so bad? Even the good times weren’t all that good: by my quick count there were only 10 months under Bush in which the economy added as many jobs as it did in an average month under Clinton.

Asking why Bush was worse than Clinton strikes me as a boring question. When I look at that graph, the first thing that jumps out at me is that even the best of times, the peaks, have been getting lower and lower for the last 40 years:

1947-2008 job decline

The chart shows a long-term decline going back 40 years (or 60 years if you can ignore the slump in the 50s). The chart masks how bad things really were in the 70s and 80s, since that is when the Baby Boom would have entered the work force, and that is also when women were entering the work force. The late 70s and early 80s should have the highest peak on this graph, and the fact that they don’t suggests something was very wrong with the economy at that time.

For me, the interesting question is how do we get back to the highest peak on this chart? I’d like to ask “How do we get back to 1947?” Some people might say “Oh, it takes a war to do that!” I’m not sure that is the right response, since we had a war under President Bush and it did not boost the economy. But for those who feel World War II is in a class by itself, and not to be emulated, I’ll accept the 1960s as a relevant comparison. For me, the most interesting parts of the graph are the peaks:

1947-2008-jobs.png

How do we get back up to the interesting peaks? We should not try to emulate the Clinton years, since the best of times under Clinton were worse than the best of times of any earlier period. We need to figure out how to recreate the dynamic economy of the earlier periods.