19763
He is currently an Affiliated Scholar at the Urban Institute in Washington , DC , a Senior Affiliate of the National Poverty Center at the University of Michigan , a National Fellow of the Program on Inequality and Social Policy at Harvard University , a Research Affiliate of the Institute for Research on Poverty at the University of Wisconsin-Madison , and a Nonresident Senior Fellow with the Brookings Metropolitan Program .
 Policy, Harvard, Research, Research
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Policy, Harvard, Research, Research