Mario obtained his PhD in Economic History from the London School of Economics in September 2023. His research studies the fiscal capacity of early 20th-Century Spain from a regional perspective. His thesis, The Political Economy of Taxation in Spain, 1901-1936, shows that Spain had a relatively low fiscal capacity and important differences in taxation across provinces. His results also show that measures seeking to increase fiscal capacity, such as the elaboration of a land cadastre, had relatively little impact. Besides his research, he has taught in two courses in the Economic History Department as a Graduate Teaching Assistant: Latin America and the International Economy and Monetary and Financial History. In his free time, Mario enjoys practicing sports as well as watching them - even better if it is surrounded by friends! He also enjoys reading Spanish and Latin American literature, and keeping up to date to what happens in politics.