Quantities are ubiquitous in science and especially in the physical sciences. My project aims to provide a comprehensive metaphysical account of quantities. A metaphysical account of quantities must address three key questions:
- What distinguishes quantities from other attributes like qualities and kinds?
- What ontology is needed for quantities?
- What is the relationship between quantities, theory, and measurement?
In this project I develop and defend a systematic answer to all three questions. The resulting view of quantities is (cautiously) realist in the sense of scientific realism, structuralist, substantivalist, and non-reductionist.
A pdf of the full manuscript is available here–please ask me for the password!