"id","author_first1","author_last1","title","year","publisher","place","keyword0","keyword1","keyword2","keyword3","keyword4","keyword5","type" "467","Peggy","Levitt","Migrants Participate Across Borders: Towards an Understanding of Forms and Consequences","2000","Russell Sage Foundations","New York","Borders","Immigration","Migrants","Political Transnationalism","Research","Transnational Politics","book"