A new report from the Union of Concerned Scientists:

http://www.ucsusa.org/clean_energy/renewable_energy/page.cfm?pageID=1505

Renewing America's Economy
A 20% National Renewable Electricity Standard Will Create Jobs and Save Consumers Money

State level reports also available:

RENEWING ARIZONA'S ECONOMY
RENEWING COLORADO'S ECONOMY
RENEWING ILLINOIS' ECONOMY
RENEWING IOWA'S ECONOMY
RENEWING MICHIGAN'S ECONOMY
RENEWING MINNESOTA'S ECONOMY
RENEWING NEW HAMPSHIRE'S ECONOMY (Coming Soon)
RENEWING NEW MEXICO'S ECONOMY (Coming Soon)
RENEWING OREGON'S ECONOMY
RENEWING PENNSYLVANIA'S ECONOMY
RENEWING TEXAS' ECONOMY
RENEWING WISCONSIN'S ECONOMY