A decade ago, 66% of all directors on American company boards were outsiders; last year that figure had risen to 78%. The California Public Employees Retirement System (CalPERs), the loudest voice in American corporate governance, argues that the only company executive on the board should be the chief executive—ie, given that the average size of the American company board is about 12,92% of all company directors should be independent non-executives. In the past ten years, the demand for non-executives has increased by almost a fifth, and CalPERS is asking for another big increase.
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