Her research is primarily in Normative Ethical Theory and Moral Psychology, with related metaphysical interests in the nature of causation as well as the nature of value. She is the author of
Uneasy Virtue (Cambridge) and
Ethics: the Fundamentals (Blackwell), as well as articles in journals such as
Philosophical Studies,
Journal of Philosophy,
Philosophy,
Ethics, and the
Australasian Journal of Philosophy. She is co-editor of the on-line journal,
The Journal of Ethics and Social Philosophy, as well as co-editor of the Normative Ethics section of the on-line encyclopedia,
The Stanford Encyclopedia of Philosophy.