State Revenue Report, Nelson A. Rockefeller Institute of Government, University at Albany

Locally-Administered Pension Plans: 2007-2011, Center for Retirement Research at Boston College

The Hidden Cost of Offshore Tax Havens: State Budgets Under Pressure from Tax Loophole Abuse, U.S. PIRG Education Fund

2012 Annual Urban Mobility Report, Texas A&M Transportation Institute

Carbon Taxes and Corporate Tax Reform, Urban-Brookings Tax Policy Center