Last year, U.S. venture capitalists invested about $10.7 billion in seed and early stage companies, 17.1 percent higher than 2012, according to data from the National Venture Capital Association (NVCA) and PricewaterhouseCoopers (PwC) Moneytree survey.  Though the overall venture capital (VC) market has returned to about the same level of activity as before the economic crisis, investment in seed and early stage companies has grown by more than a third.