sentences:  Before turning thirty he was appointed treasurer, effectively taking charge of the national reserves.Rising through the ranks in the early 1990s, he was appointed chief of staff of chairman Miguel Mancera, and served as Director General of Economic Research at the end of the 1990s, in charge of designing the Bank's economic policy with Governor Guillermo Ortiz Martínez in the aftermath of the Tequila Crisis and the Russian default crisis.While at the bank he produced several research articles on the Mexican economy and, in particular, co-authored an analysis of the Mexican Crisis along with then Deputy Governor Francisco Gil Díaz, which suggests the Mexican crisis was to a large extent an avoidable run on the Mexican peso brought about by external circumstances and political problems.