Date of Original Version



Conference Proceeding

Rights Management

Copyright 2014, Association for the Advancement of Artificial Intelligence (

Abstract or Description

We introduce the simultaneous model for cake cutting (the fair allocation of a divisible good), in which agents simultaneously send messages containing a sketch of their preferences over the cake. We show that this model enables the computation of divisions that satisfy proportionality — a popular fairness notion — using a protocol that circumvents a standard lower bound via parallel information elicitation. Cake divisions satisfying another prominent fairness notion, envy-freeness, are impossible to compute in the simultaneous model, but admit arbitrarily good approximations.



Published In

Proceedings of the AAAI Conference on Artificial Intelligence, 2014, 566-572.