The government’s Bureau of Labor Statistics (BLS) has partially missed Wal-Mart’s full-bore entry into the grocery business that has occurred rapidly over most of the past decade. A BLS employee I spoke to in preparing this column told me that the agency rotates 20% of the stores included in its price surveys annually. Thus, a new Wal-Mart superstore will take from one to five years to get into a given area’s rotation. Thus, BLS has been playing catch-up in measuring the true impact of the chain’s lower prices.

To the extent BLS’s partial omission of the Wal-Mart effect can be quantified, its impact is clearly much greater at lower income levels than at higher ones, simply because items bought there represent a larger percentage of low-income budgets. Even a few hundred bucks of real increased purchasing power at the two lowest-earning percentile cutoffs above would obviously make a big difference in the results. Even after considering competitors’ reactions, the effect is likely at least that big.

Nonetheless, even after considering the Wal-Mart effect, anyone being fair has to concede that income gains during the 1990s, especially the latter half of the decade, were more impressive. The improvement was fueled by a combination of technological advances, welfare reform, and relatively controlled spending in Washington — not necessarily in that order.

But guess what? Income inequality during the 1990s also increased, and quite significantly:

The richest 5% saw their incomes increase twice as quickly as those in lower quintiles.

Surprised? Do you not remember hearing very much about the phenomenon of growing income inequality during the 1990s?

If you don’t, you’re right. There wasn’t much.

  • A Google News archive search on “income inequality” (entered in quotes) returned 9,940 results for the date range of January 1, 2000, through December 31, 2008, but only 1,830 results between January 1, 1993, and December 31, 1999. The 1993 beginning date coincides with the first year of the Clinton administration and the 1999 cutoff was picked to avoid the 2000 presidential campaign, where talk of income inequality increased because of the Bush campaign’s proposed tax cuts.
  • Even the New York Times and its stable of preoccupied income redistributionists only had 114 articles (about 16 per year) containing “income inequality” between January 1, 1993, and December 31, 1999. But from January 1, 2000, to the end of last year, there were 308 (about 33 per year).

I can’t help but conclude that “income inequality,” like previous attempts to roll out the homeless, is a convenient media club that is employed during Republican administrations, while it’s generally kept in the closet when Democrats are in the White House.

You will know that I’m right if, as I expect, the topic gets short shrift from the media — with the exception of obsessives like former Times reporter David Cay Johnston and current Times columnist Paul Krugman — in the first few years of the Obama administration.