One factor that many attribute as an engine of our entrepreneurial economy in the US is our culture, which has over time supported individualism, creativity, and self-determination. A study released on Wednesday by the SBA Office of Advocacy shows evidence of our grass-root entrepreneurial spirit. America’s 1.6 million home-based sole proprietors generate $533 billion in annual revenue. The report finds that the average home-based sole proprietor earned $22,569 in net income on about $62,523 in revenues. These businesses are primarily service related, including administrative support services, information services and construction related services.