Firms using online advertising regularly run experiments with multiple versions of their ads since they are uncertain about which ones are most effective. Within a campaign, firms try to adapt to intermediate results of their tests, optimizing what they earn while learning about their ads. But...

Few would contest that teachers are a very important determinant of whether students learn in school and how to improve teacher performance has been the focus of much policy debate in rich and poor countries. This paper examines how incentives, both pecuniary and non-pecuniary, correlate with...

This paper uses a RCT to estimate the effectiveness of guided instruction methods as implemented in under-performing schools in Chile. The intervention improved performance substantially for the first cohort of students, but not the second. The effect is mainly accounted for by children from...

This analysis of the 2020 OECD multidimensional fragility framework is a background paper for States of Fragility 2020. It provides a snapshot of the state of fragility in the world today, paying particular attention to the 57 fragile contexts on the framework. The paper starts by unpacking the...

In 2022, the OECD will add a human capital dimension to its fragility framework in acknowledgement of the ambition set forth in States of Fragility 2018 to “never lose sight of the end goal of delivering hope and better lives for all people in fragile contexts”. The COVID-19 pandemic and its...