AN ATTEMPT TO EXPLAIN DIFFERENCES IN ECONOMIC GROWTH: A STOCHASTIC FRONTIER APPROACH.
Diana Aguiar, Leonardo Costa, Elvira Silva
Bulletin of Economic Research, vol. 69, 2017, p. E42-E65.

Portugal's Bailout and the Crisis of the European Union from a Capability Perspective
Leonardo Costa, Nuno Ornelas Martins, Francisca Guedes de Oliveira
Cambridge Journal of Economics, vol. 40, 2016, p. 1479-1496.