Here is the actual study for your perusal https://www.sciencedirect.com/science/article/pii/S1470204519304565?via%3Dihub https://www.sciencedirect.com/science/

Here is the actual study for your perusal https://www.sciencedirect.com/science/article/pii/S1470204519304565?via%3Dihub https://www.sciencedirect.com/science/article/pii/S147020451... Unfortunately, it only covers the 7 countries that funded the study, but it is much more in depth than the news article.