My new study just released from the Kauffman Foundation, The Importance of Startups in Job Creation and Job Destruction, is available now. It's short and sweet (7 pages of text), with about as simple a talking point as can be: "New firms add an average of 3 million net jobs in their first year, while older companies combined lose 1 million net jobs annually." The surprise for me, and I expect most economists/data geeks, is that aggregate gross job creation and destruction curves along the firm age axis are convex, not concave.
I don't have the individual charts in GIF format, but here's a raw one from my spreadsheet. Notice how gross job creation at startups dwarfs gross flows at other firms. For example, startups create 10x more jobs than 10-year old firms, gross, and infinitely more net. How many economists even guess this is how the U.S. economy works? I didn't until I saw the data.