@article{oai:rikkyo.repo.nii.ac.jp:00022237,
 author = {山縣, 宏之 and Yamagata, Hiroyuki},
 issue = {1},
 journal = {立教經濟學研究},
 month = {Jul},
 note = {P(論文), 研究ノート, Note},
 pages = {85--107},
 title = {“Polarization” in the U.S. Regions : A Rough Portrait of the Economic Background of Regional Polarizations},
 volume = {76},
 year = {2022}
}