Martin Langfield

Once-touted Rio Olympics may leave sour hangover

Impeaching Rousseff as likely to falter as Brazil

Argentina's vote for Macri may show Brazil the way

Argentina faces choice between magic and realism

After Cristina, a more investor-friendly Argentina

Brazil needs more than S&P downgrade to wake up

Ditching Dilma would bring Brazil new problems

Brazil needs Dilma 2.0 to shine on US visit

Colombia's economic peace dividend may be elusive

Petrobras poised to extract itself from deep water

Winning inflation fight could salvage Dilma legacy