She is the author of Labor Unions, Partisan Coalitions, and Market Reforms in Latin America (translated as Sindicatos, Coaliciones Partidarias y Reformas de Mercado en América Latina by Siglo XXI Editores), and Political Competition, Partisanship, and Policymaking in the Reform of Latin American Public Utilities. She is also the co-editor of Argentine Democracy: The Politics of Institutional Weakness, Carreras Magisteriales, Desempeño Educativo y Sindicatos de Maestros en América Latina, and Discutir Alfonsín. She has also published in International Organization, World Politics, American Journal of Political Science, Comparative Politics, Comparative Political Studies, World Development, the Annual Review of Political Science, and many Latin American academic journals.
Her research focuses on distributive politics in Latin America, including labor politics and labor regulations, public utility reform, education reform, and economic policy more generally. She is currently working on political party responsiveness to voters and on the conditions that shape the enforcement and stability of institutions.
Murillo received her B.A. from the Universidad de Buenos Aires and her M.A. and Ph.D. from Harvard University. Murillo has taught at Yale University, was a postdoctoral fellow at Harvard University (Harvard Academy for Area Studies & David Rockefeller Center for Latin American Studies), and at the Russell Sage Foundation, as well as a Fulbright fellow.