Baker has done considerable work on the finances of Social Security and retirement income, and has also done collaborated with colleagues to study the impact of labor market protections on unemployment. He has also examined the ways in which the rules of the market have been structured to redistribute income upward. This includes analysis of Federal Reserve Board policy, trade policy, and patent policy, especially with respect to prescription drugs. He has worked with a large number of labor unions, advocacy groups (on retirement issues: AARP and the National Committee to Protect Social Security and Medicare), and community based organizations (e.g. Center for Community Action, National People’s Action, ACORN).