Luis Brunstein’s research is concerned with the long-term sustainability of administered currency regimes in emerging economies, with a focus on Brazil and Argentina because, in the face of a more fragile global system these policies may promote long-term stability, along with progressive social policies, and could contribute to reduce structural poverty in both countries. Brunstein is currently exploring the day-to-day determinants of country risk indexes and the implications for building progressive public policies in Brazil and Argentina. Along the same lines, he is also interested on the effect that mass media have on the country risk index and on the construction of public opinion about public policy and its effect on long-term policy sustainability in South America.