Fortune 500 directors are estimated to spend 4.4 hours per week on board duties, and median compensation was $212,512 in 2010.

In 2001, the median compensation for an oncologist in a large practice was $274,000.

From 1970 to 2000, according to a Harvard study, the median compensation awarded to the three highest-paid officers at major American corporations rose to $4.6 million from $850,000.

The median compensation for presidents of private research universities rose to $459,643 in 2003 from $314,944 in 1999, or 46 percent, The Chronicle reported.

An annual survey on nonprofit compensation by the chronicle shows the median compensation for a chief executive last year was nearly $200,000, although some made significantly more.

According to Absolute Return + Alpha, in 2011 the mean total compensation for all hedge fund investment professionals was $690,786 and the median compensation was $312,329.

Requirement of public companies to calculate and disclose median annual compensation of all employees.

It found that the median compensation for an individual director rose 16.5 percent.

The median compensation rose 7 percent - about twice the raise that the average American worker received - to $9.1 million, at the 200 companies.

The median compensation, which was $1.6 million in 1989, rose to more than $1.7 million in 1990, Mr. O'Byrne estimated.