There are hundreds and hundreds of academic articles in law, finance, economics, business, and other social sciences discussing the issue of executive compensation broadly and down to the smallest detail. There are none — actually, one working paper in draft form on one issue — that I can find on the issue of how much and how union bosses are paid. There are scattered news reports here and there, but nothing systematic. This is shocking. The problems are the same — agency costs and the potential for self-serving behavior — as in the corporate context. Although the amounts are likely lower than for CEOs, the agency costs may be higher. I’m working on trying to make some progress on these issues, but the lack of data may make them tough to get at.