Lousteau had also been a tennis instructor (which he quit because of an injury), and worked as a war correspondent in Afghanistan for the magazines El Planeta Urbano and La Razón before the September 11 attacks.

[8] Lousteau served as chief economist and later director of APL Economía, a consulting firm founded by former Central Bank President Alfonso Prat-Gay, and went on to hold various public offices as well as positions in the private sector.

There was a dispute in the cabinet at the time between Julio de Vido, Ricardo Jaime and Guillermo Moreno, and Alberto Fernández, Graciela Ocaña, Jorge Taiana and Carlos Tomada.

[9] Lousteau wrote a report for the president on the figures of the national economy, praising several aspects of the tenure of Néstor Kirchner, but warning about the growing inflation.

[10] The salient feature of his tenure was the controversy surrounding his decision to increase soybean export taxes, which were previously fixed at 35%, and to have them fluctuate in line with global prices for the crop.

[13] Lousteau was rumored as early as two months into his tenure to have declared his intention to resign as a result of disputes with fellow ministers, particularly Commerce Secretary Guillermo Moreno.

[18] Lousteau joined the UNEN coalition, led by the centrist UCR, and was nominated to their City of Buenos Aires party list for Congress in the 2013 mid-term elections.

[20][21] He ran for mayor in 2015 backed by centre-left coalition called ECO (Energía Ciudadana Organizada), and was narrowly defeated by Horacio Rodríguez Larreta.

[23][24] He was appointed ambassador of Argentina to the United States by president Mauricio Macri in 2016, but he resigned the following year to run for National Deputy in the 2017 Argentine mid-term elections.