@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/intercultural_universities_in_Mexico>
  skos:prefLabel "intercultural universities in Mexico"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Hong_Kong_Chinese_students_studying_in_the_United_States>
  skos:prefLabel "Hong Kong Chinese students studying in the United States"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/STEM_subjects_and_diversity>
  skos:prefLabel "STEM subjects and diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/college_proximity>
  skos:prefLabel "college proximity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/diversity_issues_in_community_colleges>
  skos:prefLabel "diversity issues in community colleges"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/organizational_context_for_promoting_diversity_in_higher_education>
  skos:prefLabel "organizational context for promoting diversity in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/racial_ethnic_diversity_in_doctoral_training_programs>
  skos:prefLabel "racial/ethnic diversity in doctoral training programs"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/classroom_pedagogy_and_diversity_in_higher_education>
  skos:prefLabel "classroom pedagogy and diversity in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/religious_orientation_and_diversity>
  skos:prefLabel "religious orientation and diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Asian_American_studies>
  skos:prefLabel "Asian American studies"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/undergraduate_readiness_for_diversity>
  skos:prefLabel "undergraduate readiness for diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/access_to_higher_education>
  skos:prefLabel "access to higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/creating_the_intercultural_higher_education_campus>
  skos:prefLabel "creating the intercultural higher education campus"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/inclusive_higher_education_for_sexual_and_gender_minorities>
  skos:prefLabel "inclusive higher education for sexual and gender minorities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/faculty_diversity_in_colleges_and_universities>
  skos:prefLabel "faculty diversity in colleges and universities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/college_advising>
  skos:prefLabel "college advising"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Confucianism_and_higher_education>
  skos:prefLabel "Confucianism and higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/athletics_and_diversity>
  skos:prefLabel "athletics and diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/adult_education>
  skos:prefLabel "adult education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/service_learning>
  skos:prefLabel "service learning"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Puerto_Rican_studies>
  skos:prefLabel "Puerto Rican studies"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/first-generation_college_students>
  skos:prefLabel "first-generation college students"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Asian_Americans_and_Pacific_Islanders_in_higher_education>
  skos:prefLabel "Asian Americans and Pacific Islanders in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/community_colleges>
  skos:prefLabel "community colleges"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/critical_moments_project_in_higher_education>
  skos:prefLabel "critical moments project in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/single-sex_colleges>
  skos:prefLabel "single-sex colleges"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/linguistically_responsive_teacher_education>
  skos:prefLabel "linguistically responsive teacher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/higher_education>
  skos:prefLabel "higher education"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/postsecondary_education> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/lesbian,_gay,_bisexual,_and_transgender_issues_in_higher_education>
  skos:prefLabel "lesbian, gay, bisexual, and transgender issues in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Mexican_American_studies_Chicana_o_studies>
  skos:prefLabel "Mexican American studies/Chicana/o studies"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/college_preparation>
  skos:prefLabel "college preparation"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/overeducation>
  skos:prefLabel "overeducation"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/advanced_degrees>
  skos:prefLabel "advanced degrees"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/higher_education_curriculum_transformation>
  skos:prefLabel "higher education curriculum transformation"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/postsecondary_education>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/access_to_higher_education>, <https://concepts.sagepub.com/social-science/concept/college_proximity>, <https://concepts.sagepub.com/social-science/concept/diversity_course_requirements_in_colleges_and_universities>, <https://concepts.sagepub.com/social-science/concept/advanced_degrees>, <https://concepts.sagepub.com/social-science/concept/Asian_Americans_and_Pacific_Islanders_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/international_students_in_colleges_and_universities>, <https://concepts.sagepub.com/social-science/concept/Confucianism_and_higher_education>, <https://concepts.sagepub.com/social-science/concept/ethnic_studies_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/Hong_Kong_Chinese_students_studying_in_the_United_States>, <https://concepts.sagepub.com/social-science/concept/lesbian,_gay,_bisexual,_and_transgender_issues_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/religious_orientation_and_diversity>, <https://concepts.sagepub.com/social-science/concept/college_choice>, <https://concepts.sagepub.com/social-science/concept/first-generation_college_students>, <https://concepts.sagepub.com/social-science/concept/STEM_subjects_and_diversity>, <https://concepts.sagepub.com/social-science/concept/Grutter_v._Bollinger>, <https://concepts.sagepub.com/social-science/concept/creating_the_intercultural_higher_education_campus>, <https://concepts.sagepub.com/social-science/concept/ethnic_student_organizations>, <https://concepts.sagepub.com/social-science/concept/Asian_American_Native_American_Pacific_Islander-Serving_Institutions>, <https://concepts.sagepub.com/social-science/concept/referenda_to_ban_race-conscious_admissions>, <https://concepts.sagepub.com/social-science/concept/fraternities,_sororities,_and_diversity>, <https://concepts.sagepub.com/social-science/concept/college_transferring>, <https://concepts.sagepub.com/social-science/concept/higher_education_and_diversity_in_South_Africa>, <https://concepts.sagepub.com/social-science/concept/diversity_issues_in_community_colleges>, <https://concepts.sagepub.com/social-science/concept/faculty_diversity_in_colleges_and_universities>, <https://concepts.sagepub.com/social-science/concept/black_women%27s_studies>, <https://concepts.sagepub.com/social-science/concept/Asian_American_studies>, <https://concepts.sagepub.com/social-science/concept/critical_moments_project_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/Mexican_American_studies_Chicana_o_studies>, <https://concepts.sagepub.com/social-science/concept/athletics_and_diversity>, <https://concepts.sagepub.com/social-science/concept/international_college_partnerships>, <https://concepts.sagepub.com/social-science/concept/undocumented_students_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/adult_education>, <https://concepts.sagepub.com/social-science/concept/proprietary_colleges_and_diversity>, <https://concepts.sagepub.com/social-science/concept/higher_education>, <https://concepts.sagepub.com/social-science/concept/overeducation>, <https://concepts.sagepub.com/social-science/concept/single-sex_colleges>, <https://concepts.sagepub.com/social-science/concept/alternative_admissions_practices>, <https://concepts.sagepub.com/social-science/concept/educational_benefits_of_diversity>, <https://concepts.sagepub.com/social-science/concept/community_colleges>, <https://concepts.sagepub.com/social-science/concept/campus_Balkanization_and_segregation>, <https://concepts.sagepub.com/social-science/concept/gender_issues_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/intercultural_universities_in_Mexico>, <https://concepts.sagepub.com/social-science/concept/organizational_context_for_promoting_diversity_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/G.I._Bills>, <https://concepts.sagepub.com/social-science/concept/diversity_in_medical_schools>, <https://concepts.sagepub.com/social-science/concept/black_studies>, <https://concepts.sagepub.com/social-science/concept/undergraduate_readiness_for_diversity>, <https://concepts.sagepub.com/social-science/concept/linguistically_responsive_teacher_education>, <https://concepts.sagepub.com/social-science/concept/Puerto_Rican_studies>, <https://concepts.sagepub.com/social-science/concept/Historically_Black_Colleges_and_Universities>, <https://concepts.sagepub.com/social-science/concept/multiracial_student_issues_in_colleges_and_universities>, <https://concepts.sagepub.com/social-science/concept/classroom_pedagogy_and_diversity_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/college_advising>, <https://concepts.sagepub.com/social-science/concept/Hispanic-serving_institutions>, <https://concepts.sagepub.com/social-science/concept/free_speech_and_diversity>, <https://concepts.sagepub.com/social-science/concept/racial_ethnic_diversity_in_doctoral_training_programs>, <https://concepts.sagepub.com/social-science/concept/equity_scorecard_for_higher_education>, <https://concepts.sagepub.com/social-science/concept/service_learning>, <https://concepts.sagepub.com/social-science/concept/retention_and_diversity_in_higher_education>, <https://concepts.sagepub.com/social-science/concept/living_learning_communities>, <https://concepts.sagepub.com/social-science/concept/founding_of_black_colleges>, <https://concepts.sagepub.com/social-science/concept/lesbian,_gay,_bisexual,_and_transgender_students:_teacher_preparation_for_diversity>, <https://concepts.sagepub.com/social-science/concept/college_preparation>, <https://concepts.sagepub.com/social-science/concept/inclusive_higher_education_for_sexual_and_gender_minorities>, <https://concepts.sagepub.com/social-science/concept/liberal_arts_education>, <https://concepts.sagepub.com/social-science/concept/higher_education_curriculum_transformation>, <https://concepts.sagepub.com/social-science/concept/adult_literacy> ;
  skos:prefLabel "postsecondary education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/higher_education> ;
  skos:definition "The next level of education beyond secondary education (high school). Postsecondary education, also called higher education, encompasses institutions of higher learning, such as universities, community colleges, professional schools, as well as technical institutes. [Source: <a href=\"https://sk.sagepub.com/reference/behavioralsciences/n1956.xml\" target=\"_blank\" data-id=\"to-sk\">The SAGE Glossary of the Social and Behavioral Sciences; Postsecondary Education</a>]"@en .

<https://concepts.sagepub.com/social-science/concept/Historically_Black_Colleges_and_Universities>
  skos:prefLabel "Historically Black Colleges and Universities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/alternative_admissions_practices>
  skos:prefLabel "alternative admissions practices"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/adult_literacy>
  skos:prefLabel "adult literacy"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/gender_issues_in_higher_education>
  skos:prefLabel "gender issues in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/black_women%27s_studies>
  skos:prefLabel "black women's studies"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Asian_American_Native_American_Pacific_Islander-Serving_Institutions>
  skos:prefLabel "Asian American Native American Pacific Islander-Serving Institutions"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/lesbian,_gay,_bisexual,_and_transgender_students:_teacher_preparation_for_diversity>
  skos:prefLabel "lesbian, gay, bisexual, and transgender students: teacher preparation for diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Grutter_v._Bollinger>
  skos:prefLabel "Grutter v. Bollinger"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/college_transferring>
  skos:prefLabel "college transferring"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/higher_education_and_diversity_in_South_Africa>
  skos:prefLabel "higher education and diversity in South Africa"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/free_speech_and_diversity>
  skos:prefLabel "free speech and diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/founding_of_black_colleges>
  skos:prefLabel "founding of black colleges"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/ethnic_student_organizations>
  skos:prefLabel "ethnic student organizations"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/ethnic_studies_in_higher_education>
  skos:prefLabel "ethnic studies in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/undocumented_students_in_higher_education>
  skos:prefLabel "undocumented students in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/referenda_to_ban_race-conscious_admissions>
  skos:prefLabel "referenda to ban race-conscious admissions"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/equity_scorecard_for_higher_education>
  skos:prefLabel "equity scorecard for higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/educational_benefits_of_diversity>
  skos:prefLabel "educational benefits of diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/living_learning_communities>
  skos:prefLabel "living learning communities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/diversity_course_requirements_in_colleges_and_universities>
  skos:prefLabel "diversity course requirements in colleges and universities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/G.I._Bills>
  skos:prefLabel "G.I. Bills"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/fraternities,_sororities,_and_diversity>
  skos:prefLabel "fraternities, sororities, and diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/international_college_partnerships>
  skos:prefLabel "international college partnerships"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/proprietary_colleges_and_diversity>
  skos:prefLabel "proprietary colleges and diversity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/international_students_in_colleges_and_universities>
  skos:prefLabel "international students in colleges and universities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/college_choice>
  skos:prefLabel "college choice"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/retention_and_diversity_in_higher_education>
  skos:prefLabel "retention and diversity in higher education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/diversity_in_medical_schools>
  skos:prefLabel "diversity in medical schools"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/liberal_arts_education>
  skos:prefLabel "liberal arts education"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/multiracial_student_issues_in_colleges_and_universities>
  skos:prefLabel "multiracial student issues in colleges and universities"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/black_studies>
  skos:prefLabel "black studies"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/campus_Balkanization_and_segregation>
  skos:prefLabel "campus Balkanization and segregation"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .

<https://concepts.sagepub.com/social-science/concept/Hispanic-serving_institutions>
  skos:prefLabel "Hispanic-serving institutions"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/postsecondary_education> .