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Slum Upgrading and Long-Run Urban Development: Evidence from Indonesia

Mariaflavia Harari1; Maisy Wong2

1 University of Pennsylvania · 2 University of Pennsylvania and NBER

Review of Economic Studies 2026

Developing countries face massive urbanization and slum upgrading is a popular policy to improve shelter for many. Yet, preserving slums at the expense of formal developments can raise concerns of misallocation of land. We estimate causal, long-term impacts of the 1969–84 KIP programme, which provided basic upgrades to 5 million residents covering 25% of land in Jakarta, Indonesia. We assemble high-resolution data on programme boundaries and 2015 outcomes and address programme selection bias through localized comparisons. On average, KIP areas today have lower land values, shorter buildings, and are more informal, per a photographs-based slum index. The negative effects are concentrated within 5 km of the CBD. We develop a spatial equilibrium model to characterize the welfare implications of KIP. Counterfactuals suggest that 79% of the welfare effects stem from removing KIP in the centre and highlight how to mitigate losses to displaced residents.

DOI
10.1093/restud/rdaf090
Volume
93 (4)
Pages
2646-2679
Language
en
Export
BibTeX
Sources
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