The share of the nation’s economy stemming from small businesses — “the lifeblood of the U.S. economy” — has waned since 1998, according to a new report by Kathryn Kobe and Richard Schwinn on behalf of the U.S. Small Business Administration’s Office of Advocacy. Despite overall growth in small business GDP, the number of small businesses and their employment levels have not yet recovered from their pre-recession value. At the same time, the numbers of large businesses and large business employees have grown continuously, and large business GDP makes up an increasing share of the national pie.