One issue likely to influence voters' choice for U.S. president in November is the U.S. economy.

The Iraq War/War on Terror, and other issues, such as health care concerns, are likely to be factors as well, but look for concern about the economy to be paramount. Of course, political science teaches us that party identification and voters' attitude toward each candidate will also help determine the vote for president.

(In a nutshell, the political science theory that best predicts vote is PI + ATC + MSI = Vote. Or, Party Identification + Attitude Toward the Candidate + Most Salient Issues = Vote. But more on that, some other time.)

Further, regarding the U.S. economy, there's been considerable coverage regarding its health -- sometimes too much -- but not as much clarity. So, without further ado, some "givens" or clarity about the U.S. economy.

• U.S. GDP: The U.S. economy is experiencing anemic growth, but technically, it is not in a recession. Unemployment is trending up -- now at 6.1% -- put is still relatively low, compared to unemployment levels in previous economic slowdowns. [Note: The above is not to slight anyone who has lost his/her job; each job lost is a serious problem/concern for the person involved.]
• Median income: The median U.S. family income is down. In 2006 the median U.S. family income, adjusted for inflation, was $58,407, according to the most recent U.S. Census Bureau data, down from $59,398 in 2000. Since the economic slowdown started in October 2007, it's possible, but not likely, that median family income rose in 2008, but more than likely it fell. Moreover, it probably fell during that time period, for most families.

Population growth has slowed in the prior housing boom states of Arizona, Florida and Nevada, The Wall Street Journal reported Thursday [subscription required], citing U.S. Census Bureau data for the 12 months ended July 1, 2007.

Further, the U.S. Census Bureau's report continued to confirm a decades-long trend of U.S. population shift from the Northeast and Midwest to the West and South.

Florida, arguably the state that's been hardest hit by the housing slump, experienced the largest decline in population growth, The Journal reported. Florida's population increased by 35,301, or 1%, during the 12-month period, compared to an increase of 134,798 during the previous 12-month period.

There are lies, damned lies, and statistics. Most people attribute this phrase to 19th century British politician and writer Benjamin Disraeli (it was later popularized by our own Mark Twain). But more recently, financial blogger Barry Ritholtz has embraced the motto as his raison d'etre.

Ritholtz writes the popular financial/cultural blog The Big Picture, where, among other things, he loves to take the headline numbers and debunk them. He understands the numbers. By day he's a market strategist and fund manager.

Today he rolls his eyes and examines the latest U.S. Census and Dept. of Housing and Urban Development numbers that show a 4.8% rise in new home sales.

What the mainstream press either overlooks or fails to mention is that pesky little margin of error. For September's numbers, for example, the margin of error renders the data statistically insignificant.

So statistically speaking, there was no rise. Nothing getting better on the housing front.

Damned lies and statistics. Mark Twain would surely be a fan of the Big Picture.