Working Papers (unpublished or long versions)
- Assessing Urban Policies Using a Simulation Model with Formal and Informal Housing: Application to Cape Town, South Africa , with B. Pfeiffer, C. Rabe and V. Viguie, World Bank Policy Research Working Paper WPS 8921, June 2019.
- Highway Politics in a Divided Government: Evidence from Mexico, with Souleymane Soumahoro, World Bank Policy Research Working Paper WPS 8710, January 2019.
- Backyarding: Theory and Evidence for South Africa, with Jan Brueckner and Claus Rabe, World Bank Policy Research Working Paper WPS 8636, November 2018.
- The informal city, with Lara Tobin, World Bank Policy Research Working Paper WPS 8482, June 2018.
- The globalization of farmland: theory and empirical evidence, with R. Arezki and C. Bogmans, World Bank Policy Research Working Paper WPS 8456, May 2018.
- Roads and the geography of economic activities in Mexico, with Brain Blankespoor, Theophile Bougna and Rafael Garduno-Rivera, World Bank Policy Research Working Paper WPS 8226, October 2017.
- Children left behind in China: the role of school fees, with Hai-Anh Dang and Yang Huang, World Bank Policy Research Working Paper WPS 7881, November 2016.
- Rural-urban migration in developing countries : a survey of theoretical predictions and empirical findings, with Somik Lall and Zmarak Shalizi, World Bank Policy Research Working Paper WPS 3915, May 2006.
- The effect of segregation and spatial mismatch on unemployment: Evidence from France, with Laurent Gobillon, CEPR Working Paper 6198, 2007.