Inter-species HALYs: ethical considerations of well-being measurement across multiple species
Health-adjusted life years (HALYs) are population health measures which describe morbidity and mortality combined as one number. HALYs play a fundamental role in cost-effectiveness analysis, making it possible to compare the quantity of health-related well-being purchasable for a given investment across a range of initiatives. Currently, however, no such health measures consider human and non-human animal well-being simultaneously, representing both a philosophical and practical void in the field. This thesis looks to assess the ethical landscape surrounding the simultaneous assessment of inter-species well-being. It analyses various theories of well-being, then discusses various possible stances on relative species value and how they might be relevant to the calculation of an inter-species HALY.