The U.S. is home to seven of the world’s 10 biggest companies. How did that happen? The answer may come down to two little letters: V.C. Is venture capital good for society, or does it just help the rich get richer? Stephen Dubner invests the time to find out.

 In one of the earliest Freakonomics Radio episodes (No. 39!), we asked a bunch of economists with young kids how they approached child-rearing. Now the kids are old enough to talk — and they have a lot to say. We hear about nature vs. nurture, capitalism vs. Marxism, and why you sometimes don’t tell your friends that your father is an economist.