{"id":"https://openalex.org/W2086026386","doi":"https://doi.org/10.1145/2804360.2804367","title":"Software evolution and time series volatility: an empirical exploration","display_name":"Software evolution and time series volatility: an empirical exploration","publication_year":2015,"publication_date":"2015-08-24","ids":{"openalex":"https://openalex.org/W2086026386","doi":"https://doi.org/10.1145/2804360.2804367","mag":"2086026386"},"language":"en","primary_location":{"id":"doi:10.1145/2804360.2804367","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2804360.2804367","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 14th International Workshop on Principles of Software Evolution","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5045061250","display_name":"Jukka Ruohonen","orcid":"https://orcid.org/0000-0001-5147-3084"},"institutions":[{"id":"https://openalex.org/I155660961","display_name":"University of Turku","ror":"https://ror.org/05vghhr25","country_code":"FI","type":"education","lineage":["https://openalex.org/I155660961"]}],"countries":["FI"],"is_corresponding":true,"raw_author_name":"Jukka Ruohonen","raw_affiliation_strings":["University of Turku, Finland"],"affiliations":[{"raw_affiliation_string":"University of Turku, Finland","institution_ids":["https://openalex.org/I155660961"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5006523717","display_name":"Sami Hyrynsalmi","orcid":"https://orcid.org/0000-0002-5073-3750"},"institutions":[{"id":"https://openalex.org/I155660961","display_name":"University of Turku","ror":"https://ror.org/05vghhr25","country_code":"FI","type":"education","lineage":["https://openalex.org/I155660961"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Sami Hyrynsalmi","raw_affiliation_strings":["University of Turku, Finland"],"affiliations":[{"raw_affiliation_string":"University of Turku, Finland","institution_ids":["https://openalex.org/I155660961"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5029023235","display_name":"Ville Lepp\u00e4nen","orcid":"https://orcid.org/0000-0001-5296-677X"},"institutions":[{"id":"https://openalex.org/I155660961","display_name":"University of Turku","ror":"https://ror.org/05vghhr25","country_code":"FI","type":"education","lineage":["https://openalex.org/I155660961"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Ville Lepp\u00e4nen","raw_affiliation_strings":["University of Turku, Finland"],"affiliations":[{"raw_affiliation_string":"University of Turku, Finland","institution_ids":["https://openalex.org/I155660961"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5045061250"],"corresponding_institution_ids":["https://openalex.org/I155660961"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.09097434,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"56","last_page":"65"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10260","display_name":"Software Engineering Research","score":0.9952999949455261,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10260","display_name":"Software Engineering Research","score":0.9952999949455261,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11675","display_name":"Open Source Software Innovations","score":0.968500018119812,"subfield":{"id":"https://openalex.org/subfields/1706","display_name":"Computer Science Applications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11270","display_name":"Complex Systems and Time Series Analysis","score":0.95169997215271,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/econometrics","display_name":"Econometrics","score":0.6478323936462402},{"id":"https://openalex.org/keywords/software-evolution","display_name":"Software evolution","score":0.6423835754394531},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6030783653259277},{"id":"https://openalex.org/keywords/time-series","display_name":"Time series","score":0.600851833820343},{"id":"https://openalex.org/keywords/volatility","display_name":"Volatility (finance)","score":0.5831196308135986},{"id":"https://openalex.org/keywords/software","display_name":"Software","score":0.5429080128669739},{"id":"https://openalex.org/keywords/empirical-research","display_name":"Empirical research","score":0.4698958098888397},{"id":"https://openalex.org/keywords/conditional-variance","display_name":"Conditional variance","score":0.43665793538093567},{"id":"https://openalex.org/keywords/realized-variance","display_name":"Realized variance","score":0.4118427634239197},{"id":"https://openalex.org/keywords/software-development","display_name":"Software development","score":0.3106525242328644},{"id":"https://openalex.org/keywords/autoregressive-conditional-heteroskedasticity","display_name":"Autoregressive conditional heteroskedasticity","score":0.3036718964576721},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.2728941738605499},{"id":"https://openalex.org/keywords/economics","display_name":"Economics","score":0.1838281750679016},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.1570514738559723},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.15701940655708313},{"id":"https://openalex.org/keywords/operating-system","display_name":"Operating system","score":0.11280083656311035}],"concepts":[{"id":"https://openalex.org/C149782125","wikidata":"https://www.wikidata.org/wiki/Q160039","display_name":"Econometrics","level":1,"score":0.6478323936462402},{"id":"https://openalex.org/C202105479","wikidata":"https://www.wikidata.org/wiki/Q265013","display_name":"Software evolution","level":5,"score":0.6423835754394531},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6030783653259277},{"id":"https://openalex.org/C151406439","wikidata":"https://www.wikidata.org/wiki/Q186588","display_name":"Time series","level":2,"score":0.600851833820343},{"id":"https://openalex.org/C91602232","wikidata":"https://www.wikidata.org/wiki/Q756115","display_name":"Volatility (finance)","level":2,"score":0.5831196308135986},{"id":"https://openalex.org/C2777904410","wikidata":"https://www.wikidata.org/wiki/Q7397","display_name":"Software","level":2,"score":0.5429080128669739},{"id":"https://openalex.org/C120936955","wikidata":"https://www.wikidata.org/wiki/Q2155640","display_name":"Empirical research","level":2,"score":0.4698958098888397},{"id":"https://openalex.org/C21430997","wikidata":"https://www.wikidata.org/wiki/Q5159279","display_name":"Conditional variance","level":4,"score":0.43665793538093567},{"id":"https://openalex.org/C60092789","wikidata":"https://www.wikidata.org/wiki/Q7301291","display_name":"Realized variance","level":3,"score":0.4118427634239197},{"id":"https://openalex.org/C529173508","wikidata":"https://www.wikidata.org/wiki/Q638608","display_name":"Software development","level":3,"score":0.3106525242328644},{"id":"https://openalex.org/C23922673","wikidata":"https://www.wikidata.org/wiki/Q180752","display_name":"Autoregressive conditional heteroskedasticity","level":3,"score":0.3036718964576721},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.2728941738605499},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.1838281750679016},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.1570514738559723},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.15701940655708313},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.11280083656311035},{"id":"https://openalex.org/C186846655","wikidata":"https://www.wikidata.org/wiki/Q3398377","display_name":"Software construction","level":4,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/2804360.2804367","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2804360.2804367","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 14th International Workshop on Principles of Software Evolution","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":42,"referenced_works":["https://openalex.org/W573754218","https://openalex.org/W1521478692","https://openalex.org/W1574019121","https://openalex.org/W1576326745","https://openalex.org/W1588163064","https://openalex.org/W1940678971","https://openalex.org/W1979575715","https://openalex.org/W1985560975","https://openalex.org/W1997556556","https://openalex.org/W1998130038","https://openalex.org/W1999996900","https://openalex.org/W2023240121","https://openalex.org/W2033578965","https://openalex.org/W2037191245","https://openalex.org/W2041174350","https://openalex.org/W2043837581","https://openalex.org/W2044189551","https://openalex.org/W2066778800","https://openalex.org/W2067490448","https://openalex.org/W2082795423","https://openalex.org/W2084832108","https://openalex.org/W2086383458","https://openalex.org/W2099365611","https://openalex.org/W2100476984","https://openalex.org/W2104964025","https://openalex.org/W2106988883","https://openalex.org/W2110915013","https://openalex.org/W2111493956","https://openalex.org/W2116799040","https://openalex.org/W2126054281","https://openalex.org/W2130162792","https://openalex.org/W2134752891","https://openalex.org/W2139263764","https://openalex.org/W2141558501","https://openalex.org/W2151191515","https://openalex.org/W2152804254","https://openalex.org/W2162094297","https://openalex.org/W3121151732","https://openalex.org/W3122789689","https://openalex.org/W4243379839","https://openalex.org/W4300336601","https://openalex.org/W6679109501"],"related_works":["https://openalex.org/W4312286080","https://openalex.org/W1501678122","https://openalex.org/W3124905861","https://openalex.org/W2266808686","https://openalex.org/W3122866493","https://openalex.org/W2089062981","https://openalex.org/W2805453363","https://openalex.org/W4237170440","https://openalex.org/W2287895994","https://openalex.org/W2263203570"],"abstract_inverted_index":{"The":[0,19,43,73,84,143],"paper":[1,144],"presents":[2],"the":[3,15,26,35,55,61,117,119,133,137,148],"first":[4],"empirical":[5,74,165],"study":[6,81],"to":[7,25,54,94,106,116,147],"examine":[8],"econometric":[9,20],"time":[10,31,91,120,134],"series":[11,32,92,121],"volatility":[12,21,125],"modeling":[13],"in":[14,39],"software":[16,44,149],"evolution":[17,45,150],"context.":[18],"concept":[22],"is":[23,47,76,86,108],"related":[24,93],"conditional":[27,36],"variance":[28,52],"of":[29,57,82],"a":[30,79,111],"rather":[33],"than":[34],"mean":[37],"targeted":[38],"conventional":[40],"regression":[41],"analysis.":[42],"context":[46],"motivated":[48],"by":[49,132],"relating":[50],"these":[51,128],"characteristics":[53,67],"proximity":[56],"operating":[58],"system":[59],"releases,":[60],"theoretical":[62],"hypothesis":[63],"being":[64],"that":[65],"volatile":[66],"increase":[68],"nearby":[69],"new":[70,154],"milestone":[71],"releases.":[72,142],"experiment":[75],"done":[77],"with":[78,89,153,160],"case":[80],"FreeBSD.":[83],"analysis":[85],"carried":[87],"out":[88],"12":[90],"bug":[95],"tracking,":[96],"development":[97],"activity,":[98],"and":[99,163],"communication.":[100],"A":[101],"historical":[102],"period":[103],"from":[104],"1995":[105],"2011":[107],"covered":[109],"under":[110],"daily":[112],"sampling":[113],"frequency.":[114],"According":[115],"results":[118],"dataset":[122],"contains":[123],"visible":[124],"characteristics,":[126],"but":[127],"cannot":[129],"be":[130],"explained":[131],"windows":[135],"around":[136],"six":[138],"observed":[139],"major":[140],"FreeBSD":[141],"consequently":[145],"contributes":[146],"research":[151],"field":[152],"methodological":[155],"ideas,":[156],"as":[157,159],"well":[158],"both":[161],"positive":[162],"negative":[164],"results.":[166]},"counts_by_year":[{"year":2022,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
