The study of institutions and political power is a strand of development research that in recent years has taught us a lot about – in the name of the famous book – Why Nations Fail, but also what improves their chances of success. James Robinson talks to Tim Phillips about what he and his fellow researchers have discovered, and which directions for future research are the most exciting. Photo credit: Jeremy Weate

In the last 30 years many governments have attempted to shift service delivery away from a central bureaucracy to local administrations. How well has it worked, and what do we know about the right and wrong way to decentralise? Dilip Mookherjee talks to Tim Phillips. Photo credit: Julien Harneis

Most policies are one-size-fits-all. But in some cases, we can do better. How can we design an intervention that incentivises people to manage their diabetes and hypertension, and does it deliver better results for both the patient and the policymaker? Ariel Zucker of UC Santa Cruz tells Tim Phillips about an experiment to deliver personalised healthcare in India.

Poor air quality is a danger to children’s health, but most of what we know about the effects are from wealthy countries or large cities. A multidisciplinary study has estimated the impact of air quality on child health for many countries in sub-Saharan Africa, with surprising policy conclusions. Jennifer Burney talks to Tim Phillips.

The economies of Latin America and the Caribbean are facing some tough economic problems. What policies will improve prospects for people who live in the region? Eric Parrado, Chief Economist at the Inter-American Development Bank, talks to Tim Phillips about how IDB puts research into practice.