Sala i Martin is one of the leading economists in the field of economic growth[REF] and is consistently ranked among the most-cited economists in the world for works produced in the 1990s [REF].
Sala i Martin is the author of the economic growth textbook Apuntes de Crecimiento Economico (in Spanish) and the co-author (with Robert Barro) of the textbook Economic Growth (original in English; translated into French, German, Spanish, Chinese, and Japanese).