Power-sharing mechanisms play an increasingly important role in peace agreements. However, there is profound divergence over the positive effects of the inclusion of political power-sharing provisions in peace accords. Proposing power-sharing solutions may be useful for mediators to get conflict parties to the negotiating table. At the same time those mechanisms imply a number of challenges for academics and practitioners. Many critics argue that power-sharing as specific political model has only worked in particular circumstances, such as in Switzerland. Before formulating general guidelines and recommendations on powersharing in peace agreements, one has to address this critique. To this end the working paper analyses four contested favourable conditions in the power-sharing model: a small population size, a balance of population size between divided groups, territorial isolation of population groups and a common perceived security threat. Eight case studies are carried out in order to test these four favourable conditions that might influence the durability of power-sharing peace agreements. As a result, this working paper provides evidence that the durability of power-sharing peace agreements does probably not depend on these favourable conditions. It is therefore argued that power-sharing solutions in peace agreements do not seem to require particular favourable conditions to be successful and are not doomed to fail from the outset in a range of different contexts.