Things change. Things also get changed—often. Why? The obvious reason is that revising things often makes them better. We document a less obvious reason: revising things makes consumers think they are better, even absent objective improvement. Eleven studies document the preference for...

If we reassess the rationality question under the assumption that the uncertainty of the natural world is largely unquantifiable, where do we end up? In this article the author argues that we arrive at a statistical, normative, and cognitive theory of ecological rationality. The main casualty of...