Xavier X. Sala i Martín is an American economist and professor of economics at Columbia University. Sala i Martin is one of the leading economists in the field of economic growth.

Pompeu Fabra University is a public university located in the city of Barcelona, Catalonia in Spain. The university was created by the Autonomous Government of Catalonia in 1990 and was named after Pompeu Fabra. It is highly competitive in research and has as its goal the transformation of education to meet the challenges of the future. UPF has been ranked the best university in Spain since 2015 and 16th best young university in the world in 2022 by the Times Higher Education World University Rankings.