His research and scholarly writings have focused on psychological issues in gay and lesbian parenting and adoption, adoption and foster care, stress and coping in children, non-traditional family life, child custody issues, and children's cognitive development. He was a founding director of the Evan B. Donaldson Adoption Institute in New York and currently serves as the Research Director of the Institute's West Coast Office. He has testified in a number of nationally prominent cases, including the Baby M contested adoption case in New Jersey, the Baby Jessica contested adoption case in Michigan, the Woody Allen and Mia Farrow contested adoption and custody case in New York, and the gay marriage trial in Hawaii.