A voting rule f is self-stable (Barberà and Jackson, 2004) if any alternative rule g does not have sufficient support in the society to replace f, where the decision between f and g is based on the rule f itself. While Barberà and Jackson focused on anonymous rules in which all agents have the same voting power, we consider here the larger class of weighted majority rules. Our main result is a characterization of self-stability in this setup, which shows that only few rules of a very particular form satisfy this criterion. This result provides a possible explanation for the tendency of societies to use more conservative rules when it comes to changing the voting rule. We discuss self-stability in this latter case, where a different rule F may be used to decide between f and g.
Bibliographical noteFunding Information:
We thank two anonymous referees, an associate editor, and participants of several conferences and seminars for their comments. Kim gratefully acknowledges financial support from the National Science Council of Taiwan , grants NSC103-2410-H-002-246 and NSC104-2410-H-002-019 .
© 2016 Elsevier Inc.
All Science Journal Classification (ASJC) codes
- Economics and Econometrics