Competition for for export markets and the allocation of foreign aid 
with Fabian Barthel (LSE), Eric Neumayer (LSE), and Peter Nunnenkamp (Kiel)
Forthcoming in World Development
Eye disease, the fertility transition, and the emergence of global income differences (updated Feb 2014)
with Thomas Barnebeck Andersen (U Southern Denmark) and Carl-Johan Dalgaard (Copenhagen).
Supplementary appendix here
Politics in Bolivia (2014)
with James Robinson (Harvard).
Roads to prosperity (2014)
with Ola Olsson (Gothenburg), Carl-Johan Dalgaard (Copenhagen) and Nicolai Kaarsen (Kraka)
Marine resources, comparative development and longevity
Research program funded by an Eliteforsk grant from the Danish Research Council 2012-2014