As long as insider trading has existed, people have been fixated on it. Newspapers give it front page coverage. Cult movies romanticize it. Politicians make or break careers by pillorying, enforcing, and sometimes engaging in it. But, oddly, no one seems to know what's really wrong with insider...

Prior studies identify several motives for why firms release management earnings forecasts (MFs). A common feature of such studies is they pool MFs when drawing inferences about a specific motive. By ignoring the heterogeneous rationales managers have to issue MFs, pooling could lead to biased...