This paper presents a dynamic model, inspired by evolutionary game theory,
of how standards and norms emerge in decentralized economies. It shows that
standardization outcomes depend on adopters' attitudes to problems caused
by incompatibility. If individuals display aversion to incompatibility, sta
ndardization never fails to happen eventually, but societies sometimes end
up picking inferior standards. In this case, official action can be useful
to quickly achieve sensible standardization. On the other hand, when indivi
duals display tolerance or neutrality to incompatibility, there is neither
path-dependency nor a lock-in problem, and regulation seems a poor alternat
ive to laissez-faire. (JEL C73, D62, L1).