{"doi":"10.31235/osf.io/45axy","title":"Explaining Declining Trends in Educational Homogamy: The Role of Institutional Changes in Higher Education in Japan","abstract":"Research on educational assortative mating has devoted much attention to educational expansion but has been less focused on a concurrent trend of importance –growing differentiation among higher education institutions. In this study, I examine whether thebifurcation between high-and low-tier institutions in the context of high participation in tertiary education may help us understand the mixed evidence on educational homogamy trends across countries. Applying log-linear and log-multiplicative models to analyze trends in educational assortative matingin Japan, characterized by a clear and widely acknowledged hierarchy of institutional selectivity, I find that; (1)the odds of homogamy are higher among graduates of selective universities than among graduates of nonselective universities; (2) homogamy trends among graduates of selective and nonselective universities have diverged in recent years; (3) possibly reflecting the more rapid increase in the share of female students enrolled in less-selective institutions, the opportunity for them to “marry up” has decreased. Results suggest that close attention should be paid to the important and growing heterogeneity of institutional characteristics that has been obscured in earlier studies to understand the impact of educational assortative mating on economic inequality.","journal":"SocArXiv (OSF Preprints)","year":2020,"id":125956,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":2,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9525,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":572946,"name":"Fumiya Uchikoshi","orcid":"0000-0002-4972-4275","position":0,"is_corresponding":true}],"reference_count":71,"raw_metadata":null,"created_at":"2026-07-18T23:15:19.482428Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}