Encyclopedia Articles “Aid”, in Hugh LaFollette (ed.), The International Encyclopedia of Ethics (Oxford: Wiley Blackwell, 2013). “Bernard Williams”, in Stuart Brown (ed.), Dictionary of Twentieth-Century British Philosophers (London: Thoemmes Continuum, 2005), Vol.2, pp. 1132-1138. “Charity”, in Hugh LaFollette (ed.), The International Encyclopedia of Ethics (Oxford: Wiley Blackwell, 2013). “Free Riding”, in Hugh LaFollette (ed.), The International Encyclopedia of Ethics (Oxford: Wiley Blackwell, 2013). “Impartiality”, in Hugh LaFollette (ed.), The International Encyclopedia of Ethics (Oxford: Wiley Blackwell, 2013). “Moral Judgement”, in Edward Craig (ed.), The Routledge Encyclopedia of Philosophy (London: Routledge, 1998). “Public Goods”, in Lawrence C. Becker and Charlotte B. Becker (eds), Encyclopedia of Ethics, 2nd edition (New York: Routledge, 2001), Vol.III, pp.1413-16.