Dr. Mueller's primary research interests include the determinants of entry into post-secondary education and other related education issues. His work has appeared in a number of economics and Canadian studies journals, and edited volumes. He is co-editor, along with Ross Finnie, Arthur Sweetman and Alex Usher, and contributor to Who Goes? Who Stays? What Matters? Accessing and Persisting in Post-Secondary Education in Canada, and co-editor, along with Ross Finnie, Marc Frenette and Arthur Sweetman, and contributor to Pursuing Higher Education in Canada: Economic, Social and Policy Dimensions, published in 2008 and 2010, respectively, by McGill-Queen's University Press.