Complex systems do not operate in a linear manner, but rather exhibit a series of well-defined characteristics: tipping points, feedback loops, path dependence and sensibility to local contexts. Understanding complexity is thus an important element in policy making and reform, as complex systems cannot be successfully governed with the linear mechanisms of the traditional policy cycle. Devolving power to local authorities will not improve the functioning of the system unless it is accompanied by attention to the connections and interactivity present. This interactivity means that a single intervention may generate both positive and negative effects in different parts of the system. For example, disclosing information about school performance might have a very different impact on a school that is thriving than on a school that is struggling to attract well-performing students.