Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yamagata Tatsufumi,Centralized and Decentralized Supplies of COVID-19 Vaccines to Developing Countries: Both COVAX and Competition Motivated by Vaccine Diplomacy Play Each Role,KOKUSAI KEIZAI,0387-3943,The Japan Society of International Economics,2022,73,0,155-184,https://cir.nii.ac.jp/crid/1390011727207720064,https://doi.org/10.5652/kokusaikeizai.kk2022.f06