Angel investors, who fund young companies with modest sums, have resumed their place as stokers of economic growth, planting small sums of money into budding firms that need cash and mentoring.

FORBES: Where Angels Dare to Tread

Small businesses, particularly young firms with high growth potential, create most of the net new jobs in our economy.

WHITEHOUSE: Press Briefing

Also, growth may be fuelled by thousands of small entrepreneurial companies that never come to market and thus do not recompense shareholders in existing firms.

ECONOMIST: Buttonwood