The ceasefire between the U.S. and Iran is set to expire tomorrow. Peace talks between the countries remain uncertain. And, Trump's pick to lead the Federal Reserve faces a tough confirmation hearing today.

For decades, economists gave short shrift to the idea of monopsony — a power employers can have to suppress wages. Now a wave of research suggests it's everywhere, and a new book argues it's key to understanding today's inequality.

Taken together, these four features can create a trancelike state that can keep us stuck on social media apps or video games for hours. Children are particularly vulnerable.