{"doi":"10.1002/asi.20609","title":"What do we know about the <i>h</i> index?","abstract":"<jats:title>Abstract</jats:title><jats:p>Jorge Hirsch (2005a, 2005b) recently proposed the <jats:italic>h</jats:italic> index to quantify the research output of individual scientists. The new index has attracted a lot of attention in the scientific community. The claim that the <jats:italic>h</jats:italic> index in a single number provides a good representation of the scientific lifetime achievement of a scientist as well as the (supposed) simple calculation of the <jats:italic>h</jats:italic> index using common literature databases lead to the danger of improper use of the index. We describe the advantages and disadvantages of the <jats:italic>h</jats:italic> index and summarize the studies on the convergent validity of this index. We also introduce corrections and complements as well as single‐number alternatives to the <jats:italic>h</jats:italic> index.</jats:p>","journal":"Journal of the American Society for Information Science and Technology","year":2007,"id":8002,"datarank":0.9726952853452879,"base_score":6.484635235635252,"endowment":6.484635235635252,"self_citation_contribution":0.9726952853452879,"citation_network_contribution":0.0,"self_endowment_contribution":0.9726952853452879,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":654,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.0847,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2007-06-13","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":5654,"name":"Hans‐Dieter Daniel","orcid":"0000-0001-7925-1846","position":1,"is_corresponding":false},{"id":661,"name":"Lutz Bornmann","orcid":"0000-0003-0810-7091","position":0,"is_corresponding":true}],"reference_count":57,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-03-01T18:20:47.508186Z","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":[]}