His are of specialization is the religious and civic life of first generation Asian Americans. He is the author of Faith, Family and Filipino American Community Life (2014 Rutgers University Press) and Global Religious Movements Across Border: Sacred Service (2014 Ashagate). In 2006 he received the Society for the Scientific Study of Religion Distinguished Article Award. He is currently working on a national study of Asian and Pacific Island Catholics with two co-authors and in collaboration with the United States Conference of Catholic Bishops.