Marten Gilens’s ‘Affluence and Influence’

For Marten Gilens 'Affluence and Influence: Economic Inequality and Political Power in America", page 69 falls smack in the middle of the "data and methods" chapter. That doesn't seem fair. So I'm invoking the Ford exception, so named for Ford Madox Ford, who said, "Open the book to page ninety-nine and read, and the quality of the whole will be revealed to you." So here's the best bit on page 99,