Miller is an economist whose work focuses on policies and programs to increase the employment and earnings of low-wage workers and disadvantaged young adults. She is the project director for the Paycheck Plus evaluation, testing an expanded Earned Income Tax Credit for single workers without dependent children in New York City. She also leads the YouthBuild evaluation, which is studying the effects of YouthBuild on disadvantaged young people using data from nearly 80 programs around the country. She is a lead investigator for the Family Rewards Opportunity NYC Project, the first test of a Conditional Cash Transfer (CCT) program in the United States, and the CCT replication study funded by the Social Innovation Fund. She received her PhD in economics from Columbia University.