“…In line with the previous literature, we have considered the influence of the following covariates in the regression for EXPY: the GDP per capita, the investment rate, the stock of FDI, trade in P&C, and openness. The relevance of GDP per capita in the export sophistication of countries is a robust result that remains stable through different model specifications and methodologies (see, for instance, HHR, and Lin et al, 2017). However, as pointed out by Zhu and Fu (2013), rather than the role of per capita income itself, this result might mask the influence of those fundamentals of export sophistication that determine per capita income such as human capital, FDI, trade or institutional quality.…”