Arrow's theorem teaches us about a surprisingly hard limit to what voting procedures can achieve. How does the proof of the theorem actually work?

Concept Nest is a Website which aims to share important ideas that arise in philosophy, ethics, rational choice theory, and economics.

These fields often use technical concepts that can be forbidding to learn and master. This website collects simple illustrations and introductory videos, to make these important topics more widely understood.

The author is Toby Handfield, an academic at Monash University in Melbourne, Australia.

All in Rational choice theory

... by using well defined mathematical ideas, it is possible to generalise over large numbers of different possible voting techniques.

Things change their value as they get closer to the present. A visit to the dentist in the next hour is much worse than a visit to the dentist in a few weeks.