？Policentrismo o ampliación de la centralidad histórica en el área Metropolitana del Gran Santiago?: Evidencia novedosa proveniente de la encuesta Casen 2009

questions on commuting from the 2002 population census and the 2009 casen (national socioeconomic characterization) survey of chile are used for assessing two hypotheses raised in some recent articles about the metropolitan area of greater santiago (mags): i) the advancement of polycentrism, and ii) territorial diffusion of employment across the mags. both hypotheses are based on mainstream theories of metropolitan change, and have been supported by evidence from several cities, mostly in developed countries. however, these hypotheses do not take the effects of santiago's high levels of residential segregation into account. according to results obtained in this study, the mags is experiencing a mixed process: new centralities indeed are arising but they do not overshadow yet the concentration of employment in the wider historic centrality.