Statistical Analysis
The data retrieved were recorded on Microsoft Excel spreadsheets (Microsoft 365 Office ProPlus, Microsoft Inc.) and further analysed to assess the relations between said economic parameters to scholar productivity in each OECD country. SPSS version 21 (IBM, Chicago, Il) was used for statistical analyses. Normal distribution of variables was tested analytically by the Shapiro-Wilk test. Descriptive statistics are presented as a mean ± standard deviation (SD) for normal distributed variables and as a median with interquartile range (IQR) for non-normal distributed variables. The correlation between economic and bibliometric indicators was assessed by Pearson’s correlation or Spearman’s rank correlation, as appropriate according to the normality test. The analyses of the differences in academic productivity between native and non-native English countries and between global regions were performed using the Mann-Whitney test.