Moving from ideal theory to non-ideal theory and empirical applications makes the selection of relevant capabilities even more complicated, for other concerns such as feasibility, data availability, practical relevance, and even parsimony may play significant roles. Several proposals are on offer, ranging from substantive proposals with elaborate theoretical underpinnings, through several procedural methods, to the atheoretical practice that an investigator should simply conduct a survey in order to collect rich data (or use an existing survey) and let a statistical technique, such as factor analysis, “decide.” At one end of this spectrum is Nussbaum’s well-known list, which contains prescribed capabilities that are grouped together under ten “central human capabilities”: life; bodily health; bodily integrity; senses, imagination and thought; emotions; practical reason; affiliation; other species; play; and control over one’s environment (Nussbaum 2006: 76–78).