Economic Complexity: Correlations between Gross Domestic Product and Fitness

In this paper we study the causal relation between country Economic Fitness [Formula: see text] and its Gross Domestic Product per capita ([Formula: see text]). Using the Takens’ theorem, as first suggested in (Sugihara, G. et al. 2012), we show that there exists a reasonable evidence of causal correlation between [Formula: see text] and [Formula: see text] for relatively rich countries. This is not the case for relatively poor countries where [Formula: see text] and [Formula: see text] do not show any significant causal relation. We also present some preliminary results to understand whether [Formula: see text] or [Formula: see text] are driving factor for economic growth.