Sam Altman, president of startup accelerating firm Y Combinator, talks to EconTalk host Russ Roberts about Y Combinator's innovative strategy for discovering, funding, and coaching groundbreaking startups, what the company looks for in a potential startup, and Silicon Valley's attitude toward entrenched firms. The two also discuss Altman's thoughts on sectors of the economy that are ripe for innovation and how new firms are revolutionizing operations in these industries.