During this period she rejoined the Council of Economic Advisors as a congressionally confirmed chief economist.
In 2007 she moved to Harvard University where she held positions in the Kennedy School of Government and the T.H.
[3] Her research areas include health economics, welfare, and public finance, with a particular focus on the financing of health insurance, spending on public programs, and fiscal federalism.
She believes in Medicare copayments as a way of reducing medical spending on unnecessary care.
She is currently one of the leaders of a research program investigating the many effects of expanding health insurance coverage in the context of a randomized Medicaid expansion in Oregon.