Measuring Economic Output

Looking Beyond GDP -
https://www.whitehouse.gov/sites/default/files/docs/gdo_issue_brief_final.pdf

US GDP vs. GDI

http://blogs.wsj.com/economics/2015/08/27/by-another-measure-u-s-economic-growth-has-nearly-stalled-this-year/ 

http://www.bloomberg.com/news/articles/2015-08-27/under-the-hood-of-u-s-gdp-was-divide-between-growth-incomes
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2015 Q2 US GDP revised up:

http://blogs.wsj.com/briefly/2015/08/27/u-s-gdp-growth-at-a-glance/

(I am not exactly sure why inventories are being built up so much by businesses. Might impact growth in future quarters)

Longer-Term Revisions (Lesson: Current GDP estimates will inevitably be revised in the future)

Source: BEA