@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/sampling_error>
  skos:prefLabel "sampling error"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/longitudinal_analysis> .

<https://concepts.sagepub.com/social-science/concept/retrospective_data>
  skos:prefLabel "retrospective data"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/longitudinal_analysis> .

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

<https://concepts.sagepub.com/social-science/concept/longitudinal_analysis>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/sampling_error>, <https://concepts.sagepub.com/social-science/concept/retrospective_data>, <https://concepts.sagepub.com/social-science/concept/prospective_data>, <https://concepts.sagepub.com/social-science/concept/attrition> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/quantitative_data_analysis> ;
  skos:prefLabel "longitudinal analysis"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/prospective_data>
  skos:prefLabel "prospective data"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/longitudinal_analysis> .

<https://concepts.sagepub.com/social-science/concept/quantitative_data_analysis>
  skos:prefLabel "quantitative data analysis"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/longitudinal_analysis> .

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