He has also taught at the University of California, Santa Barbara and the University of Vermont. He is the author of Empty Vision: Metaphor and Visionary Imagery in Mah&y&na Buddhism (Curzon Press, 2001); "New Frontiers in Buddhism: Three Recent Works on Buddhism in America," Journal of Global Buddhism 1 (2000); "Orality, Writing and Authority in South Asian Buddhism: Visionary Literature and the Struggle for Legitimacy in the Mahayana," History of Religions 37, no. 3, 1998; and "A Long Awaited Call: A Buddhist Response," in Ethics and World Religions: Cross-Cultural Case Studies, edited by Regina Wentzel Wolfe and Christine E. Gudorf (Maryknoll: Orbis Books, 1999).