Hello,
I am confused with use of the verb 'to have' in the sentence below. I would've written 'have been suggested' instead of 'has been suggested'. Why is the author using this form?
The easy-money policies of the Fed during Greenspan's tenure
has been suggested to be a leading cause of the subprime mortgage crisis, which occurred within months of his departure from the Fed, and has, said the
Wall Street Journal, "tarnished his image".
Source: Wikipedia (
http://en.wikipedia.org/wiki/Alan_Greenspan)