{"id":"https://openalex.org/W4286209723","doi":"https://doi.org/10.3390/e24071005","title":"Evolution of Cohesion between USA Financial Sector Companies before, during, and Post-Economic Crisis: Complex Networks Approach","display_name":"Evolution of Cohesion between USA Financial Sector Companies before, during, and Post-Economic Crisis: Complex Networks Approach","publication_year":2022,"publication_date":"2022-07-20","ids":{"openalex":"https://openalex.org/W4286209723","doi":"https://doi.org/10.3390/e24071005","pmid":"https://pubmed.ncbi.nlm.nih.gov/35885228"},"language":"en","primary_location":{"id":"doi:10.3390/e24071005","is_oa":true,"landing_page_url":"https://doi.org/10.3390/e24071005","pdf_url":null,"source":{"id":"https://openalex.org/S195231649","display_name":"Entropy","issn_l":"1099-4300","issn":["1099-4300"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Entropy","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://doi.org/10.3390/e24071005","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5008734976","display_name":"Vojin Stevi\u0107","orcid":"https://orcid.org/0000-0001-9188-5614"},"institutions":[{"id":"https://openalex.org/I4068193","display_name":"University of Belgrade","ror":"https://ror.org/02qsmb048","country_code":"RS","type":"education","lineage":["https://openalex.org/I4068193"]}],"countries":["RS"],"is_corresponding":false,"raw_author_name":"Vojin Stevi\u0107","raw_affiliation_strings":["University of Belgrade-School of Electrical Engineering, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia"],"affiliations":[{"raw_affiliation_string":"University of Belgrade-School of Electrical Engineering, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia","institution_ids":["https://openalex.org/I4068193"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5076674787","display_name":"Marija Ra\u0161ajski","orcid":"https://orcid.org/0000-0003-1212-0803"},"institutions":[{"id":"https://openalex.org/I4068193","display_name":"University of Belgrade","ror":"https://ror.org/02qsmb048","country_code":"RS","type":"education","lineage":["https://openalex.org/I4068193"]}],"countries":["RS"],"is_corresponding":false,"raw_author_name":"Marija Ra\u0161ajski","raw_affiliation_strings":["University of Belgrade-School of Electrical Engineering, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia"],"affiliations":[{"raw_affiliation_string":"University of Belgrade-School of Electrical Engineering, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia","institution_ids":["https://openalex.org/I4068193"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5045879414","display_name":"Marija Mitrovi\u0107 Dankulov","orcid":"https://orcid.org/0000-0002-8484-3501"},"institutions":[{"id":"https://openalex.org/I4068193","display_name":"University of Belgrade","ror":"https://ror.org/02qsmb048","country_code":"RS","type":"education","lineage":["https://openalex.org/I4068193"]},{"id":"https://openalex.org/I4210149559","display_name":"Institute of Physics Belgrade","ror":"https://ror.org/04h3h5b09","country_code":"RS","type":"facility","lineage":["https://openalex.org/I4068193","https://openalex.org/I4210149559"]}],"countries":["RS"],"is_corresponding":true,"raw_author_name":"Marija Mitrovi\u0107 Dankulov","raw_affiliation_strings":["Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia"],"affiliations":[{"raw_affiliation_string":"Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia","institution_ids":["https://openalex.org/I4068193","https://openalex.org/I4210149559"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5045879414"],"corresponding_institution_ids":["https://openalex.org/I4068193","https://openalex.org/I4210149559"],"apc_list":{"value":2000,"currency":"CHF","value_usd":2165},"apc_paid":{"value":2000,"currency":"CHF","value_usd":2165},"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.17655026,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"24","issue":"7","first_page":"1005","last_page":"1005"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11270","display_name":"Complex Systems and Time Series Analysis","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2002","display_name":"Economics and Econometrics"},"field":{"id":"https://openalex.org/fields/20","display_name":"Economics, Econometrics and Finance"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},"topics":[{"id":"https://openalex.org/T11270","display_name":"Complex Systems and Time Series Analysis","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2002","display_name":"Economics and Econometrics"},"field":{"id":"https://openalex.org/fields/20","display_name":"Economics, Econometrics and Finance"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10064","display_name":"Complex Network Analysis Techniques","score":0.9922999739646912,"subfield":{"id":"https://openalex.org/subfields/3109","display_name":"Statistical and Nonlinear Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12592","display_name":"Opinion Dynamics and Social Influence","score":0.9825000166893005,"subfield":{"id":"https://openalex.org/subfields/3109","display_name":"Statistical and Nonlinear Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/systemic-risk","display_name":"Systemic risk","score":0.6807011961936951},{"id":"https://openalex.org/keywords/cohesion","display_name":"Cohesion (chemistry)","score":0.5654484629631042},{"id":"https://openalex.org/keywords/econometrics","display_name":"Econometrics","score":0.5474926829338074},{"id":"https://openalex.org/keywords/financial-crisis","display_name":"Financial crisis","score":0.5001661777496338},{"id":"https://openalex.org/keywords/economics","display_name":"Economics","score":0.4777214229106903},{"id":"https://openalex.org/keywords/complex-system","display_name":"Complex system","score":0.47524213790893555},{"id":"https://openalex.org/keywords/network-structure","display_name":"Network structure","score":0.4730890393257141},{"id":"https://openalex.org/keywords/complex-network","display_name":"Complex network","score":0.4495587646961212},{"id":"https://openalex.org/keywords/stability","display_name":"Stability (learning theory)","score":0.4338322579860687},{"id":"https://openalex.org/keywords/relation","display_name":"Relation (database)","score":0.4276714324951172},{"id":"https://openalex.org/keywords/economic-stability","display_name":"Economic stability","score":0.41604530811309814},{"id":"https://openalex.org/keywords/correlation","display_name":"Correlation","score":0.4135195016860962},{"id":"https://openalex.org/keywords/statistical-physics","display_name":"Statistical physics","score":0.34811776876449585},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.3252300024032593},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2537391185760498},{"id":"https://openalex.org/keywords/macroeconomics","display_name":"Macroeconomics","score":0.2300707995891571},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.15225860476493835},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.13301801681518555}],"concepts":[{"id":"https://openalex.org/C144587487","wikidata":"https://www.wikidata.org/wiki/Q1369234","display_name":"Systemic risk","level":3,"score":0.6807011961936951},{"id":"https://openalex.org/C104054115","wikidata":"https://www.wikidata.org/wiki/Q216828","display_name":"Cohesion (chemistry)","level":2,"score":0.5654484629631042},{"id":"https://openalex.org/C149782125","wikidata":"https://www.wikidata.org/wiki/Q160039","display_name":"Econometrics","level":1,"score":0.5474926829338074},{"id":"https://openalex.org/C2778300220","wikidata":"https://www.wikidata.org/wiki/Q114380","display_name":"Financial crisis","level":2,"score":0.5001661777496338},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.4777214229106903},{"id":"https://openalex.org/C47822265","wikidata":"https://www.wikidata.org/wiki/Q854457","display_name":"Complex system","level":2,"score":0.47524213790893555},{"id":"https://openalex.org/C2988224531","wikidata":"https://www.wikidata.org/wiki/Q20830730","display_name":"Network structure","level":2,"score":0.4730890393257141},{"id":"https://openalex.org/C34947359","wikidata":"https://www.wikidata.org/wiki/Q665189","display_name":"Complex network","level":2,"score":0.4495587646961212},{"id":"https://openalex.org/C112972136","wikidata":"https://www.wikidata.org/wiki/Q7595718","display_name":"Stability (learning theory)","level":2,"score":0.4338322579860687},{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.4276714324951172},{"id":"https://openalex.org/C73374054","wikidata":"https://www.wikidata.org/wiki/Q2995667","display_name":"Economic stability","level":2,"score":0.41604530811309814},{"id":"https://openalex.org/C117220453","wikidata":"https://www.wikidata.org/wiki/Q5172842","display_name":"Correlation","level":2,"score":0.4135195016860962},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.34811776876449585},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3252300024032593},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2537391185760498},{"id":"https://openalex.org/C139719470","wikidata":"https://www.wikidata.org/wiki/Q39680","display_name":"Macroeconomics","level":1,"score":0.2300707995891571},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.15225860476493835},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.13301801681518555},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.0},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.0}],"mesh":[],"locations_count":5,"locations":[{"id":"doi:10.3390/e24071005","is_oa":true,"landing_page_url":"https://doi.org/10.3390/e24071005","pdf_url":null,"source":{"id":"https://openalex.org/S195231649","display_name":"Entropy","issn_l":"1099-4300","issn":["1099-4300"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Entropy","raw_type":"journal-article"},{"id":"pmid:35885228","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/35885228","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Entropy (Basel, Switzerland)","raw_type":null},{"id":"pmh:oai:doaj.org/article:1a64a6670d6145dd839b06f53cc45251","is_oa":true,"landing_page_url":"https://doaj.org/article/1a64a6670d6145dd839b06f53cc45251","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Entropy, Vol 24, Iss 7, p 1005 (2022)","raw_type":"article"},{"id":"pmh:oai:mdpi.com:/1099-4300/24/7/1005/","is_oa":true,"landing_page_url":"https://dx.doi.org/10.3390/e24071005","pdf_url":null,"source":{"id":"https://openalex.org/S4306400947","display_name":"MDPI (MDPI AG)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210097602","host_organization_name":"Multidisciplinary Digital Publishing Institute (Switzerland)","host_organization_lineage":["https://openalex.org/I4210097602"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Entropy; Volume 24; Issue 7; Pages: 1005","raw_type":"Text"},{"id":"pmh:oai:pubmedcentral.nih.gov:9323811","is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/9323811","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Entropy (Basel)","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.3390/e24071005","is_oa":true,"landing_page_url":"https://doi.org/10.3390/e24071005","pdf_url":null,"source":{"id":"https://openalex.org/S195231649","display_name":"Entropy","issn_l":"1099-4300","issn":["1099-4300"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Entropy","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/8","score":0.46000000834465027,"display_name":"Decent work and economic growth"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":49,"referenced_works":["https://openalex.org/W957909200","https://openalex.org/W1482172641","https://openalex.org/W1586537758","https://openalex.org/W1590482685","https://openalex.org/W1595344052","https://openalex.org/W1803765581","https://openalex.org/W1976483110","https://openalex.org/W1997120876","https://openalex.org/W2017821362","https://openalex.org/W2021159684","https://openalex.org/W2027374262","https://openalex.org/W2028085631","https://openalex.org/W2029730669","https://openalex.org/W2034176375","https://openalex.org/W2040000666","https://openalex.org/W2056508960","https://openalex.org/W2062190797","https://openalex.org/W2070722739","https://openalex.org/W2072010802","https://openalex.org/W2075628964","https://openalex.org/W2075984423","https://openalex.org/W2079154490","https://openalex.org/W2085712123","https://openalex.org/W2089954894","https://openalex.org/W2101378420","https://openalex.org/W2127048411","https://openalex.org/W2127993947","https://openalex.org/W2128590107","https://openalex.org/W2131681506","https://openalex.org/W2133078124","https://openalex.org/W2173587936","https://openalex.org/W2320932058","https://openalex.org/W2579735128","https://openalex.org/W2610454053","https://openalex.org/W2749108916","https://openalex.org/W2768238732","https://openalex.org/W2771915725","https://openalex.org/W2788000335","https://openalex.org/W2806339129","https://openalex.org/W2950742836","https://openalex.org/W2963525819","https://openalex.org/W3099768174","https://openalex.org/W3101776442","https://openalex.org/W3102641634","https://openalex.org/W3123267698","https://openalex.org/W3125515476","https://openalex.org/W3126021322","https://openalex.org/W4240438002","https://openalex.org/W6732307867"],"related_works":["https://openalex.org/W2899084033","https://openalex.org/W1968382581","https://openalex.org/W1996375507","https://openalex.org/W2163408165","https://openalex.org/W172100523","https://openalex.org/W2357738402","https://openalex.org/W3044501653","https://openalex.org/W3105007507","https://openalex.org/W2393131823","https://openalex.org/W2073852560"],"abstract_inverted_index":{"Various":[0],"mathematical":[1],"frameworks":[2],"play":[3],"an":[4,140],"essential":[5],"role":[6],"in":[7,17,155,157],"understanding":[8],"the":[9,13,20,23,28,32,50,62,72,76,87,90,97,103,107,111,116,120,124,151,158,167,170,184,187,192],"economic":[10,53,141],"systems":[11],"and":[12,31,110,123,129,149,164,182],"emergence":[14,33],"of":[15,25,34,38,52,65,79,89,96,106,119,133,169,186],"crises":[16],"them.":[18],"Understanding":[19],"relation":[21,125],"between":[22,27,75,126],"structure":[24,118,148,168],"connections":[26],"system's":[29,142,193],"constituents":[30],"a":[35,46,84],"crisis":[36,152],"is":[37,69,99,144,153],"great":[39],"importance.":[40],"In":[41],"this":[42],"paper,":[43],"we":[44],"propose":[45],"novel":[47],"method":[48,176],"for":[49],"inference":[51],"systems'":[54],"structures":[55],"based":[56],"on":[57,86],"complex":[58],"networks":[59,122],"theory":[60],"utilizing":[61],"time":[63,77],"series":[64,78],"prices.":[66],"Our":[67,136],"network":[68,109],"obtained":[70,121],"from":[71],"correlation":[73,91,112],"matrix":[74],"companies'":[80],"prices":[81],"by":[82,101],"imposing":[83],"threshold":[85,98,108],"values":[88],"coefficients.":[92],"The":[93],"optimal":[94],"value":[95],"determined":[100],"comparing":[102],"spectral":[104],"properties":[105],"matrix.":[113],"We":[114,160,172],"analyze":[115],"community":[117],"communities'":[127],"inter":[128],"intra-connectivity":[130],"as":[131],"indicators":[132],"systemic":[134,180],"risk.":[135],"results":[137],"show":[138,161],"how":[139,150,162],"behavior":[143],"related":[145],"to":[146,190],"its":[147],"reflected":[154],"changes":[156],"structure.":[159],"regulation":[163],"deregulation":[165],"affect":[166],"system.":[171],"demonstrate":[173],"that":[174],"our":[175],"can":[177],"identify":[178],"high":[179],"risks":[181],"measure":[183],"impact":[185],"actions":[188],"taken":[189],"increase":[191],"stability.":[194]},"counts_by_year":[],"updated_date":"2026-03-20T23:20:44.827607","created_date":"2025-10-10T00:00:00"}
