Argentina is the only country in the world that was "developed" in 1900 and "developing" in 2000. The various competing explanations highlight, mainly, the roles of trade openness, political institutions, financial integration, financial development, and macroeconomic instability. Yet no study has, to the best of our knowledge, attempted a quantitative assessment of the relative importance of each of these competing explanations. This paper tries to fill this gap. It investigates their individual effects on economic growth and volatility using the power-ARCH framework with annual data since the 1890s. The results indicate that financial development and institutional change are the two main factors that help understand the extraordinary growth trajectory of Argentina over the last century.