We need to rein in Silicon Valley unicorns, says law prof

In Silicon Valley, a "unicorn" is a private startup with a net worth of $1 billion. As the term suggests, these were once incredibly rare creatures. Most startups would go public within 4-7 years, long before they had a $1 billion valuation. But two key pieces of legislation made the rare into the rampaging, starting in 1996. In her new book, Untamed Unicorns: Why Startup Finance is Broken and How…