Hicham Ouakil, Lakhal Tarik, Hicham El Ouazzani, and Abdelhamid Moustabchir. “Understanding the Role of Income in Personal Happiness: A Comprehensive PSM Analysis in the United States”. The Pakistan Development Review, vol. 63, no. 3, Oct. 2024, pp. 399-16, https://thepdr.pk/index.php/pdr/article/view/3333.