A Special Joe Primer

If you get foggy at the mention of interest rates, or bleary-eyed
while trying to wade through an article in the Wall Street Journal,
we've written this page for you: a bare-bone primer on the major
numbers economists throw around.

GDP

GDP (Gross Domestic Product) is
the most common number used to show how large – and so how strong - a
nation's economy is. It is the dollar value of all goods and services a
nation produces, including those produced abroad. Sometimes you'll see GDP per capita – or person – to show how comparatively rich or poor a nation is. GDP growth tells how fast an economy is growing, which – for many economists – is the ultimate sign of a healthy economy.

GDP: $12.3 trillion (2005) CBO; $39,732 per person NationMaster (2004)

GDP growth over the years

source: BEA

Inflation and the Consumer Price Index (CPI).

Inflation
is the rising costs of goods. The most common way it's measured is the
CPI. CPI looks at a “basket of goods” that people generally buy and
tracks how much those goods rise in cost. Some inflation is seen as a
good thing: "deflation" or "stagflation" (prices going down or staying
put) are signs of a slowing economy, whereas "hyerperinflation" (prices
rising too fast) can destabilize the economy.

Inflation: 3.4% (2004-2005) BLS

Inflation over the years

source: BLS

Unemployment 

Unemployment rate is the percentage of people who
are in the workforce (people working or looking for work) who are out
of a job. Since jobs are always turning over, a small unemployment rate
of 5% is seen as normal and healthy. Some economists, however, say that
the unemployment rate is not the best way to track how well the
workforce is doing, because people who give up looking for work or who
are accepting lower wages are not included in the tally. See also our unemployment fact page.

Unemployment rate: 4.8% (July, 2006) BLS

Unemployment rate over the years

source: BLS

Job growth 

Job growth is
usually spelled out in the number of new jobs added to the economy each
month/year. Because the workforce keeps growing, the economy needs
about 150,000 new jobs a month just to keep even.

Job growth over the past couple of years

source: BLS

Poverty 

Poverty started
being measured in 1959 to track the number of people who lacked the
basic necessities to get by. The current formula used to set the
poverty level was developed in 1963; it figures out how much it costs
to feed a family and multiplies that number by three, since in 1963
families spent about a third of their income on food.

Critics of the poverty formula come from both
sides. The left says the formula underestimates how much it actually
costs to live, particularly in more expensive urban areas. The rights
says the national poverty figures are at odds with stats that show the
poor are living better than they were 30 years ago; they say the
temporary status of poverty along with other benefits probably explain
why. Also see our poverty facts page.

Poverty rate: 12.7% of all Americans (2005)

Over the years

source: Census

Interest rates 

Interest Rates – and the “federal interest rate.” Interest
rates, for our readers lucky enough to never borrow money, are the
rates a lender charges you when you take out a loan (in any form –
student loan, mortgage, credit card balance). The “federal interest
rate” or “discount rate” is the rate at which banks borrow from the
fed. Although it doesn't dictate how much interest banks charge their
customers, it usually has a strong influence – so when the fed's rate
goes up, interest rates in general go up too. (But not always – for a
good primer on how interest rates work, see the ChicagoFed.)

Primary interest rate: 5.25%

Interest rate levels over the past three years

source: Fed

Trade deficit 

rade deficits - or the "current account deficit" - happen
when a country imports more goods than it exports. Nations generally
like to avoid trade deficits – because they have to borrow money to
make up the shortfall – but some argue a trade deficit is only a
natural by-product of globalization. (Note: the trade deficit is not
the same as “the budget deficit” – which is how much more our
government spends each year than it raises in taxes. For more on the
deficit, see our debt and deficit page.)

Trade deficit: $791.5 billion (2005) BEA

Trade deficit as a percentage of GDP over the years (the
graph shows the "balance of current accounts" - anything above zero is
a trade surplus and anything below is a trade deficit)

source: BEA

Where the numbers are from:

• BEA - Bureau of Economic Analysis

• BLS - Bureau of Labor Statistics

• CBO - Congressional Budget Office

• Fed - Federal Reserve

Other primers out there:

• Backgrounders from the Economist

Did we miss something, let some slant slip in, lose a link - or
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