KEY POINTS:
It's been well documented - not that anyone ever questioned the idea - that when it comes to human interactions, men are from Mars, women are from Venus.
Men and women communicate differently, act differently and have different emotional needs. Manifestations of these innate differences aren't confined to
the sexes' relationship with one another. Instead, they infuse perceptions and expectations in the outside world, even when it comes to something with no obvious male/female bias: inflation.
"That men and women occasionally see things differently is not a remarkable observation," says Michael Bryan, economist at the Federal Reserve Bank of Cleveland. "But that the sexes could report vastly different perspectives on the rate at which prices are rising over a long period of time is astonishing."
Bryan has studied decades of data on this battle of the sexes, using the University of Michigan Survey of Consumers, a joint survey conducted by the Cleveland Fed and Ohio State University among others. He found that demographics played a role in determining the public's estimates and predictions of inflation.
Those who are rich, married, white and middle-aged have lower inflation perceptions and expectations than those who are poor, single, non-white and young. That seems almost intuitive: Society's "haves" are better positioned to endure cost-of-living increases than the "have-nots."
Yet even after holding income, age, education, race and marital status constant, "men and women hold very different views on the rate at which prices are changing." Bryan writes in a November 2001 commentary, "The Curiously Different Inflation Perspectives of Men and Women."
Women consistently think inflation is 1.9 percentage points higher than men, and they expect prices to rise 2.1 percentage points more than men.
What can explain this gender gap?
"I've had a lot of theories over the years, only to see them knocked down," he says.
I know a challenge when I hear one. To help Bryan out, I conducted my own unscientific survey of randomly selected women. The only prerequisite was knowing what CPI stands for.
1. I AM HAUSFRAU HEAR ME ROAR
Simply put, women do most of the household shopping.
This was one of Bryan's early working hypotheses, which he dismissed as unconvincing. Just because women do a disproportionate amount of the shopping and have "a more accurate perception of price behaviour ," there is no obvious reason why that perception should be systematically higher or lower than men, he writes.
"Over time prices go up, not down," says Michelle Girard, senior economist at RBS Greenwich Capital Markets. The frequent shopper is "more likely to experience price increases," not to mention anticipate their continuation in the future.
2. SPA RATS
Men and women shop for different stuff. Men make more infrequent and larger purchases: the occasional Porsche, computer or flat-screen TV. Women shop on a regular basis, but "they use services more than men," Girard says. "My hairdresser raises his prices every year."
In the last 20 years, the consumer price index for services (nothing excluded) increased an average 3.4 per cent annually.
3. WORRY BIAS
Economist Veronique de Rugy, a senior research fellow at the Mercatus Center at George Mason University in Arlington, Virginia, said: "It has everything to do with motherhood. It must be a worry bias."
After all, we women "aren't confused by numbers," she says.
4. QUALITY SHOPPERS
Many items in the CPI are adjusted for quality changes.
For example, when the 2008 model year cars come out, the Bureau of Labor Statistics determines how much of the higher sticker price is improved quality and how much is an actual price increase.
The average woman will say fine, I'll take the 2007 model because it's cheaper and has less of that flashy chrome. Can you hear a guy saying that?
Why do women's expectations matter? Because Fed policy makers see expectations as a driver of inflation.
If women are consistently experiencing and expecting higher inflation, then the Fed needs to do something about it.
Instead of wasting his time speaking to groups of Wall St bankers, where women are underrepresented, Fed Chairman Ben Bernanke needs to branch out and talk at some Venus gatherings: PTA meetings, Tupperware parties.
Better yet he could make an appearance on the The View.
* Caroline Baum is a Bloomberg News columnist.