GDP is also an indirect measure of the overall economy of that region. Read story.
Economists work with GDP estimates into two categories: international and domestic. Read story.
Some important parts of the economy never find their way into GDP estimates because they just aren't counted. Read story.
Estimating the value, or GDP, produced by all the people, companies, governments, and organizations in an entire country is ... Read story.
GDP is used to measure economic progress over time and to compare different countries or regions to one another. Read story.