Published online by Cambridge University Press: 01 January 2022
Reflection and martingale principles are central to models of rational learning. They can be justified in a variety of ways. In what follows we study martingale and reflection principles in the context of measure theory. We give special attention to two approaches for justifying these principles that have not been studied in that context before: diachronic coherence and the value of information. Together with an extant argument based on expected accuracy, these arguments lend support to the thesis that reflection and martingale principles govern rational learning.
We would like to thank audiences at the PSA 2018, at Caltech, and at the University of Groningen for helpful discussions.