High-income economies
€500
Upper-middle-income economies
€400
Lower-middle-income economies
€300
Low-income economies
€200
Notice: For authors from Serbia, Bosnia and Herzegovina, Croatia, Montenegro, Kosovo, and Macedonia, the publication fee (supp) is equal to 500 EURO.
Important Note: The above publication fee (supp) is for the papers with up to ONLY 4 authors. In case the paper has more than 4 authors, an extra 100 Euro will be charged per extra author, regardless of his/her country. It should be noted that the First Author is responsible for paying the total publication fee (supp).