with McKeever, S. , 2011, Aesthetics and particularism, in M. Brady (ed.), New waves in metaethics, Basingstoke, Palgrave Macmillan, pp. 264-285.
, 2005a, 'Universalizability for collective rational agents: a critique of agent-relativism', Philosophy and Phenomenological Research 70 (1), 34-66.