VoxDev Development Economics VoxDev.org

How does new evidence influence the beliefs of policymakers, and when do hidden
biases of beliefs lead to bad policy decisions? There is more rigorous empirical
evidence on which interventions work than ever. But that doesn’t translate into better
policy unless a policymaker acts on it. Eva Vivalt and Tim Phillips offer advice to
researchers on how to present their insights.

In both high- and low-income countries, taxes are the main source of government
revenue. They fund roads, schools, and social programmes. But the average tax-to-
GDP ratio in a developing country is less than half of the ratio in the global north.
Oyebola Okunogbe tells Tim Phillips about the innovative ways that many LMICs are
using to collect the taxes that will finance their growth.

Inequality is high in many LMICs, and progressive taxation is a policy tool that would reduce it. But would a personal income tax or a consumption tax redistribute in the same way as in a high-income country? Lucie Gadenne of Queen Mary University of London and the IFS tells Tim Phillips that one of these taxes may be less progressive, and one may be more progressive, than we expect.

In a world of economic nationalism rather than integration, the export-led pathway to
development that transformed China, Vietnam and other countries might no longer
be effective. Instead, Penny Goldberg tells Tim Phillips, policies for poverty reduction
now also need to answer the question of where demand will come from, and that
may require more emphasis on creating a domestic middle class.

Agriculture makes up a large share of employment and GDP in Africa, but crop yields remain stubbornly low. VoxDev has published Issue 2 of Agricultural Technology in Africa, which reviews what the published literature can – and cannot – explain about this stagnation. Chris Udry, one of the editors, tells Tim Phillips about the impact of this stagnation on living standards in Africa, and insights from recent research that can potentially make a difference.

Read the VoxDevLit: https://voxdev.org/voxdevlit/agricultural-technology-africa

How can we take what we learn in educational RCTs and apply it at scale to many
schools, maybe in many countries? Adrienne Lucas talks to Tim Phillips about the
project she was part of to improve learning in Ghana, the difference between small-
and large-scale trials, and the challenge of implementing policies results without
perfect compliance or daily monitoring.