"I don't sympathize with the Bolivian or Venezuela models, but the numbers at the moment indicate there is little difference with other countries."
Having a left wing or right wing government in South America has made no difference at all to regional economic performances
A great post over at Gran Combo that compares South American countries' economies, specifically by exports and FDI. Here's one of the charts available (go over to Rendon's post for the others).
Apart from the recent winner being Bolivia (YAY!) the pattern is pretty clear over the region. They're all in the same boat. As for the source material used, the stats come from the United Nations via its favoured (and pretty darn sharp) macro-economy studio in LatAm, Chile's ECLAC/CEPAL. The English language report is available right here. As Rendon writes (translated)