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            <front>

                <journal-meta>
                                    <journal-id></journal-id>
            <journal-title-group>
                                                                                    <journal-title>Doğuş Üniversitesi Dergisi</journal-title>
            </journal-title-group>
                                        <issn pub-type="epub">1308-6979</issn>
                                                                                            <publisher>
                    <publisher-name>Dogus University</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id pub-id-type="doi">10.31671/doujournal.1362646</article-id>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Finance</subject>
                                                            <subject>Business Administration</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Finans</subject>
                                                            <subject>İşletme </subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <article-title>DETERMINATION OF EFFICIENCIES OF INFORMATION TECHNOLOGY SECTOR COMPANIES TRADED ON BORSA ISTANBUL IN TERMS OF FINANCIAL PERFORMANCES UNDER THE EFFECT OF COVID-19 PANDEMIC BY USING DEA WINDOW ANALYSIS</article-title>
                                                                                                                                                                                                <trans-title-group xml:lang="tr">
                                    <trans-title>BORSA İSTANBUL&#039;DA İŞLEM GÖREN BİLİŞİM SEKTÖRÜ ŞİRKETLERİNİN COVİD-19 PANDEMİSİ ETKİSİ ALTINDA FİNANSAL PERFORMANS AÇISINDAN ETKİNLİKLERİNİN VZA PENCERE ANALİZİ KULLANILARAK BELİRLENMESİ</trans-title>
                                </trans-title-group>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0009-0002-7379-4430</contrib-id>
                                                                <name>
                                    <surname>Eryiğit</surname>
                                    <given-names>Merve</given-names>
                                </name>
                                                                    <aff>HACETTEPE ÜNİVERSİTESİ, FEN FAKÜLTESİ, İSTATİSTİK BÖLÜMÜ</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0001-9271-485X</contrib-id>
                                                                <name>
                                    <surname>Polat</surname>
                                    <given-names>Esra</given-names>
                                </name>
                                                                    <aff>HACETTEPE ÜNİVERSİTESİ İSTATİSTİK BÖLÜMÜ</aff>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20240702">
                    <day>07</day>
                    <month>02</month>
                    <year>2024</year>
                </pub-date>
                                        <volume>25</volume>
                                        <issue>2</issue>
                                        <fpage>113</fpage>
                                        <lpage>128</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20230919">
                        <day>09</day>
                        <month>19</month>
                        <year>2023</year>
                    </date>
                                                    <date date-type="accepted" iso-8601-date="20240126">
                        <day>01</day>
                        <month>26</month>
                        <year>2024</year>
                    </date>
                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 2000, Dogus University Journal</copyright-statement>
                    <copyright-year>2000</copyright-year>
                    <copyright-holder>Dogus University Journal</copyright-holder>
                </permissions>
            
                                                                                                <abstract><p>Window analysis is a time-dependent variant of Data Envelopment Analysis (DEA) and it is based on the moving average method. It is used for showing the trend of Decision Making Units’ (DMUs&#039;) performance over various times. The efficiency changes of 13 companies operating in Borsa Istanbul (BIST) Information Technology (IT) sector for quarterly periods between 2019:03 and 2021:06 are evaluated by DEA Window Analysis. The input-oriented CCR model and the input-oriented BCC Windows analysis models are applied on data set. When the CCR model and BCC model window analysis results are evaluated together, one of the first two periods with the highest average efficiency for both of them is 2021:06, and the period with the lowest average efficiency for both of them is 2019:09. DESPC company has the highest average efficiency for both models.</p></abstract>
                                                                                                                                    <trans-abstract xml:lang="tr">
                            <p>Pencere analizi, Veri Zarflama Analizi’nin (VZA) zamana bağlı bir çeşididir ve hareketli ortalama yöntemini temel alır. Karar Verme Birimleri’nin (KVB&#039;ler) performansının çeşitli zamanlardaki eğilimini göstermek için kullanışlıdır. Borsa İstanbul (BIST) Bilgi Teknolojileri (BT) sektöründe faaliyet gösteren 13 şirketin 2019:03 ve 2021:06 arasındaki üçer aylık dönemler itibarıyla etkinlik değişimleri VZA Pencere Analizi ile değerlendirilir. Veri kümesi üzerinde girdi odaklı CCR modeli ve girdi odaklı BCC Pencere analiz modelleri uygulanır. CCR modeli ve BCC modeli pencere analizi sonuçları birlikte değerlendirildiğinde her iki model için ortalama etkinliğin en yüksek olduğu ilk iki dönemden biri 2021:06, her iki model için ortalama etkinliğin en düşük olduğu dönem ise 2019:09&#039;dur. DESPC firması her iki model için de en yüksek ortalama etkinliğe sahiptir.</p></trans-abstract>
                                                            
            
                                                            <kwd-group>
                                                    <kwd>BIST</kwd>
                                                    <kwd>  COVID-19</kwd>
                                                    <kwd>  Efficiency</kwd>
                                                    <kwd>  Financial Performance</kwd>
                                                    <kwd>  DEA Window Analysis</kwd>
                                            </kwd-group>
                                                        
                                                                            <kwd-group xml:lang="tr">
                                                    <kwd>BIST</kwd>
                                                    <kwd>  COVID-19</kwd>
                                                    <kwd>  Etkinlik</kwd>
                                                    <kwd>  Finansal Performans</kwd>
                                                    <kwd>  VZA Pencere Analizi</kwd>
                                            </kwd-group>
                                                                                                            </article-meta>
    </front>
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