Inflation, deflation, stagflation–they've all got proponents. But who's going to be right? The difficulty here is that supply and demand are dynamic and so there are always things going up in price that haven't changed materially (and are therefore not worth the higher cost) and other things dropping in price even though they haven't changed materially.

So proponents of inflation and deflation can always offer examples supporting their case. The stagflationist camp is delighted to offer a compromise case: yes, there are both deflationary and inflationary dynamics, and what we have is the worst of both worlds: stagnant growth and declining purchasing power.

What's missing in most of these debates is a comparison of scale: deflationists point to things like big-screen TV prices dropping. OK, fine: we save $300 on a TV that we might buy once every two or three years. So we save $100 a year thanks to this deflation.

Meanwhile, on the inflationary side, healthcare insurance went up $3,000 a year, childcare went up $3,000 a year, rent (or property taxes) went up $3,000 a year and care for an elderly parent went up $3,000 a year: that's $12,000. Now how many big-screen TVs, shoddy jeans, etc. that dropped a bit in price will we have to buy to offset $12,000 in higher costs?