The GDP monster: Always under revision

The Gross Domestic Product, or GDP, is constantly being revived. That‘s because counting all the goods and services sold in the country can be a challenging and overwhelming task. Usually, the government issues at least three versions of the GDP, but last year, the figure was revised all the way back to 1929. Watch this video, reported with CNBC’s Jeff Cox to learn why.Feb. 27, 2014