Shenyuan Wu. “A Comparison of the Economic Effects of Immigration Scale in the United States and Japan: An Analysis of the Differences in GDP Growth from the Perspective of Immigration Concentration Degree”. Series of Conferences Journal 2, no. 1 (September 30, 2025): 264–276. Accessed April 13, 2026. https://seriesofconference.com/index.php/SCJ/article/view/75.