International Journal of Interactive Mobile Technologies (iJIM) – eISSN: 1865-7923 – Vol. 15, No. 18, 2021 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of E-Services and E-Service Quality https://doi.org/10.3991/ijim.v15i18.24519 Javed Ali1,2(*), Ahmad Jusoh2, Norhalimah Idris2, Alhamzah F. Abbas2, Ahmed H. Alsharif 2 1Sukkur IBA University, Sindh, Pakistan 2Universiti Teknologi Malaysia, Johor Bahru, Malaysia javedali@iba-suk.edu.pk Abstract—Purpose: The purpose of the study was to explore the develop- ments in ‘e-services and e-service quality’ from 2000 to 2020. Data Source: Scopus database was used to conduct the bibliometric analysis of 404 documents. Method: VOSviewer software was used to analyse the research articles asso- ciated with ‘e-services and e-service quality’ research. Search was limited to keywords of ‘e-services OR e-service and e-service quality’. Findings: Results revealed that the field of ‘Business, Management and Accounting’ had the highest number of publications. Total Quality Management and Business Excellence was found at the top among the most productive journals in chosen search. Chang W.-I. and Yuan S.-T. from Taiwan were found to be the leading authors among top ten authors. United States and National Cheng Kung University of Taiwan were found to be the leading country and institution in the selected search of e-service and e-service quality. Originality/Value: This study, to best of our knowledge, is the first of its kind in mapping the ‘e-services and e-service quality’ literature in Scopus. This will aid in shaping the central theme and set the future research directions for the researchers. Keywords—e-services, e-service quality, bibliometric analysis 1 Introduction Bibliometric analysis is a tool which is used to explore the trends and develop- ments in the body of knowledge. It is the empirical and theoretical works of various researchers whose valuable contributions develop certain discipline, area or construct overtime [1], [2]. Bibliometric analysis is a quantitative approach which helps to iden- tify and analyze the data related with keywords used and searched in the literature, their relationships, the number of articles published in a particular time frame and their 148 http://www.i-jim.org https://doi.org/10.3991/ijim.v15i18.24519 mailto:javedali@iba-suk.edu.pk Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… citations [3]–[5]. The current paper is intended to review e-services and e-service qual- ity research by using bibliometric technique. Services are defined by Lovelock & Wirtz, (2004), as “economic activities between two parties, implying an exchange of value between seller and buyer in a marketplace”. When the services are performed in cyberspace such as using technologies, they are termed as e-services. As customers evaluate other services, they also evaluate e-services and their performances. Therefore, e-service quality is the consumer’s evaluation and judgement of services in virtual markets and cyberspace [7]. Few studies had performed bibliometric analysis on service quality. Ali et al., [8] reviewed the concept of service quality in healthcare by using bibliometric analysis. Altıntaş et al., [9] used bibliometric analysis for e-tailing service. A review and bib- liometric analysis of service quality, and customer satisfaction was conducted by Yas et al., [10] and they had used Scopus database. But to the best of our knowledge, this was the first bibliometric study on e-services and e-service quality. Therefore, the pur- pose of current paper was to explore and comprehend the trends and developments of e-services and e-service quality globally. Following research questions were addressed by the current paper. RQ 1. What is the publication output of ‘e-services and e-service quality’ search across the years? RQ 2. What are the most prominent authors and journals that contributed to the development of ‘e-services and e-service quality’ research? RQ 3. What are the most productive institutions and countries in ‘e-services and e-service quality’ search? RQ 4. What is the bibliometric mapping of ‘e-services and e-service quality’ search in terms of authors, countries, keywords, and documents? 2 Method Bibliometric analysis is a technique utilized by researchers to understand the global trends of a chosen research area in the database of academic literature. It makes it dif- ferent from the review paper which discusses the latest developments, challenges and critics, and future directions of a specific research area [2], [8]. 2.1 Data source & search strategy The Scopus database was the source of data of the current study. It is considered as the largest citation and abstract database of peer-reviewed literature which cover a wide array of subjects [2], [5]. Data were extracted for the bibliometric analysis from the database from the date of May 20, 2021, to May 25, 2021. The search string was mainly focused on the central theme that was ‘e-service quality’. It was further limited to exact keywords such as e-service quality, e-services, and e-service which resulted in 1002 documents. The oldest publication was found in the year 2000. Therefore, trend of publication was mentioned from 2000 till 2020. iJIM ‒ Vol. 15, No. 18, 2021 149 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… The search was then limited to document type – articles, source type – journals, lan- guage – English, and the year 2021 was excluded. The final documents were 404 which were utilized for the analysis. The search process flow is shown in the Figure 1 and the search string is given in Appendix 1. Keywords “E-service & E-services & E-service quality”. (n=1002) Excluded the Year 2021 (n=974) Document type ‘article’ only (n=418) Source type ‘journals’ only (n=413) ‘English’ language only (n=404) Fig. 1. Search process flow 3 Analysis & results We executed the bibliometric analysis on 404 documents. We analyzed the publica- tion output across timeframe, the most productive journals and authors, the most promi- nent countries and institutions, contributions across different disciplines, co-authorship for authors and countries, co-occurrence of author keywords, and bibliographic cou- pling of documents. 3.1 Publication output For the 20 years of search, 404 research papers had been published (Figure 2). The oldest paper was published in 2000 and the recent one was in 2020 as 2021 was excluded. Till 2005, less than 10 documents were published per year. After 2005, there was increasing number of publications in e-services and e-service quality research. In 2005, Parasuraman et al., [11] developed multi-item e-s-qual scale to measure e-service quality which could triggered the publications in said area. Overall trend of publication was increasing across the years. We found 2019 was the highest publication year with 46 documents. Most of the papers were published in the field of Business, Manage- ment and Accounting (27%) followed by Computer Science (26%) and Social Sciences (13%). All other fields and subjects witnessed less than 10% in e-services and e-service quality research (Figure 3). 150 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… 3 3 5 3 4 14 11 16 19 24 33 34 24 26 24 33 32 19 46 31 3 6 11 14 18 32 43 59 78 102 135 169 193 219 243 276 308 327 373 404 0 50 100 150 200 250 300 350 400 450 0 5 10 15 20 25 30 35 40 45 50 2 0 0 0 2 0 0 1 2 0 0 2 2 0 0 4 2 0 0 5 2 0 0 6 2 0 0 7 2 0 0 8 2 0 0 9 2 0 1 0 2 0 1 1 2 0 1 2 2 0 1 3 2 0 1 4 2 0 1 5 2 0 1 6 2 0 1 7 2 0 1 8 2 0 1 9 2 0 2 0 C u m u la ti v e P u b li c a ti o n N u m b e r o f a rt ic le s Year Publication Output Fig. 2. Publication output Business, Management and Accounting 27% Computer Science 26% Social Sciences 14% Engineering 9% Decision Sciences 7% Economics, Econometrics and … Mathematics 3% Arts and Humanities… Psychology… Others (Biochemistry, Biological, Energ, Medicine, Environmental, Genetics)… Fig. 3. Distribution of documents across subjects 3.2 Most productive journals and prominent authors We analyzed the most productive journals and the most prominent authors in e-ser- vices and e-service quality research. Our results revealed the top 10 most productive journals and prominent authors in the ‘e-services and e-service quality’ research in Table 1 & Table 2. Total Quality Management and Business Excellence was found at the top with the most publications with 4.6 cite score (2019) and it was published by Taylor and Francis. It was followed by Information Technology and People and Service Industries Journal, and they were published by Emerald and Taylor and Francis, respectively. All top ten journals were mentioned in Table 1. iJIM ‒ Vol. 15, No. 18, 2021 151 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Table 1. List of top ten journals S/ No Journal TP (%) Cite Score 2019 The Most Cited Article Times Cited Publisher 1 Total Quality Management and Business Excellence 10 4.6 A. The impact of e-service quality, customer satisfaction and loyalty on e-marketing: Moderating effect of perceived value 225 Taylor & Francis 2 Information Technology and People 8 3.1 B. Factors influencing consumer intention in social commerce adoption 55 Emerald 3 Service Industries Journal 8 3.3 C. Measuring the antecedents of e-loyalty and the effect of switching costs on website 49 Taylor & Francis 4 Electronic Government 7 1.5 D. Significant socio- economic factors for local e-government development in Portugal 49 Inderscience 5 Expert Systems with Applications 7 11.0 E. A combined fuzzy AHP and fuzzy TOPSIS based strategic analysis of electronic service quality in healthcare industry 262 Elsevier Top of Form 6 Industrial Management and Data Systems 7 7.9 F. Determinants of satisfaction and continuance intention towards self-service technologies 158 Emerald 7 International Journal of Services, Technology and Management 6 0.4 G. Customer-based innovation of knowledge e-services: The importance of after-innovation 32 Inderscience 8 Journal of Internet Commerce 6 3.7 H. Consumer’s Perception of Website Service Quality: An Empirical Study 23 Taylor & Francis 9 Computers in Human Behavior 5 12.1 I. What drives consumer knowledge sharing in online travel communities? Personal attributes or e-service factors? 49 Elsevier 10 Electronic Commerce Research and Applications 5 6.9 J. How to design personalization in a context of customer retention: Who personalizes what and to what extent? 49 Elsevier Our results revealed top ten authors who had contributed to the development in e-service and e-service quality. Chang W.-I. and Yuan S.-T. were at the top with total publication of 04 and both authors were from Taiwan. They were followed by Ba S. and Boyer K.K. from United States. All the facts regarding top ten authors were mentioned in table. 152 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Ta bl e 2. L is t o f t op te n au th or s N o A ut ho r Sc op us A ut ho r ID Y ea r of 1 st P ub lic at io n* T P h- in de x T C C ur re nt A ffi lia ti on C ou nt ry 1 C ha ng W .-I . 74 04 56 47 32 20 09 * 4 9 28 N at io na l T ai pe i U ni ve rs ity o f T ec hn ol og y, T ai pe i, Ta iw an 2 Y ua n S. -T . 14 04 94 57 50 0 20 08 * 4 13 52 N at io na l C he ng ch i U ni ve rs ity , T ai pe i, Ta iw an 3 B a S. 56 12 62 74 30 0 20 07 * 3 18 60 U ni ve rs ity o f C on ne ct ic ut , S to rr s, U ni te d St at es 4 B oy er K . K . 35 51 21 15 80 0 20 02 * 3 36 40 7 T he O hi o St at e U ni ve rs ity , C ol um bu s, U ni te d St at es 5 C ha ng H . H . 13 30 99 83 90 0 20 09 * 3 25 25 6 N at io na l C he ng K un g U ni ve rs ity , T ai na n, Ta iw an 6 Fe at he rm an M . S . 65 06 43 94 58 20 06 * 3 15 16 7 C ar so n C ol le ge o f B us in es s, P ul lm an , U ni te d St at es 7 M ac hi ra ju V . 55 92 70 88 40 0 20 00 ** * 3 6 6 Sp ri ng er -V er la g, B er lin , G er m an y 8 M ar im on F . 65 04 40 54 53 20 11 ** 3 22 90 U ni ve rs ita t I nt er na ci on al d e C at al un ya , B ar ce lo na , Sp ai n 9 N ijk am p P. 71 02 95 86 84 20 11 ** 3 62 30 V ri je U ni ve rs ite it A m st er da m , N et he rl an ds 10 R ah i S . 57 00 31 77 50 0 20 19 * 3 12 49 U ni ve rs ity o f t he P un ja b, L ah or e, Pa ki st an N ot es : * Fi rs t A ut ho r, ** S ec on d A ut ho r, ** * T hi rd A ut ho r. iJIM ‒ Vol. 15, No. 18, 2021 153 https://www.scopus.com/affil/profile.uri?afid=60027018 https://www.scopus.com/affil/profile.uri?afid=60022659 https://www.scopus.com/affil/profile.uri?afid=60003500 https://www.scopus.com/affil/profile.uri?afid=60014982 https://www.scopus.com/affil/profile.uri?afid=60159411 https://www.scopus.com/affil/profile.uri?afid=60068651 https://www.scopus.com/affil/profile.uri?afid=60008734 https://www.scopus.com/affil/profile.uri?afid=60053707 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… 3.3 The leading countries and institutions We analyzed the leading countries and institutions in our search. United States was found at the top with 76 total publications for countries (TPC). It was followed by Taiwan (TPC, 51) and India (TPC, 30). Other top countries were mentioned in Figure 4. Among the top ten institutions, National Cheng Kung University in Taiwan was leading the others with total publications (TPI) of 06, followed by Hewlett Packard Laborato- ries of United States with 05 TPI. Other leading institutions were mentioned in Figure 4. Fig. 4. Top countries and institutions 3.4 Bibliometric maps VOSviewer (Centre for Science and Technology Studies, Leiden University, Netherlands) was the software that was used in mapping the literature of e-service quality research. It was a software which read the bibliometric maps pertaining to cita- tions, author keywords and bibliographical information of databases. Maps include the items which represent the names of documents, authors, countries, and keywords. These items relate to each other by the link and its strength. This link is showed with positive numerical value. The higher the value, the higher the link strength between two items [12], [13], [14]. 3.5 Co-authorship (authors) The co-authorship analysis represents two authors contribute to a publication together. It is the link strength between two authors who have coauthored the number of publications. However, the total link strength (TLS) shows the total co-authorship strength of a selected author with other authors. We applied different thresholds while executing co-authorship. Maximum number of authors per document was 25. The minimum number of documents of an author was 01, and minimum number of citations was remained 00. After applying these criteria, 154 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… all the authors (n=975) met the threshold. We found that Li H., Lu J., and Nijkamp P. had the highest total link strength (TLS) which was 09, followed by Wu D. who had got 8 TLS. All other details such as number of documents and citations of these authors and others were mentioned in Table 3. Screenshots of the co-authors were created from two types of maps. Figure 5 rep- resented the map of all authors included in the analysis (n=975). It also contained the items which were not connected with other items. The layout for visualization of not connected set was set as its attraction value was 03 and repulsion was 02. Figure 6 represented the connected set of items (authors) which contained the largest connected set of 15 items (authors). Fig. 5. Screenshot of co-authorship (Authors): not connected set Fig. 6. Screenshot of co-authorship (Authors): connected set iJIM ‒ Vol. 15, No. 18, 2021 155 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Table 3. List of authors as per TLS Item (Author) Documents Citations TLS Item (Author) Documents Citations TLS Li H. 3 53 9 Yin Q. 1 24 6 Lu J. 3 776 9 Yuan S.-T. 4 52 6 Nijkamp P. 3 30 9 Zarina L. 2 1 6 Wu D. 2 699 8 Zhang Z. 3 60 6 Chang H.H. 3 256 7 Zhou C. 1 24 6 Gordijn J. 2 15 7 Agrawal V. 2 7 5 Parasuraman A. 2 1976 7 Al-Ammary J. 1 4 5 Suhartanto D. 2 47 7 Al-Kaabi R. 1 4 5 Zhang Q. 2 30 7 Al-Soufi A. 1 4 5 Al-Dweeri R.M. 2 12 6 Ali H. 2 9 5 Alonso A. 1 1 6 Aljawder M. 1 4 5 Ba S. 3 60 6 Alrayes A. 1 4 5 Backman A. 1 4 6 Asif M. 1 5 5 Balina S. 2 1 6 Brohman M.K. 1 35 5 Barra E. 1 1 6 Bukhari M.H. 1 5 5 Baumgarte D. 2 1 6 Chawla S. 1 2 5 Bölte S. 1 4 6 Cho Y.-N. 1 7 5 Chen Y.-C. 3 44 6 Choi C.S. 1 7 5 Frostvittra M. 1 4 6 Hayes J.P. 1 2 5 Gordillo A. 1 1 6 Hernández- Soriano F. 2 13 5 Hirvikoski T. 1 4 6 Hussain A. 1 5 5 Huang S. 1 24 6 Hwang J. 1 5 5 Keith-Bodros G. 1 4 6 Jameel A. 1 5 5 López-Pernas S. 1 1 6 Johnson J.H. 1 2 5 Machiraju V. 3 6 6 Jr. 1 2 5 Marco L. 1 1 6 Kathawala Y.A. 1 2 5 Marimon F. 3 90 6 Kim K.H. 1 7 5 Mellblom A. 1 4 6 Kim S.J. 1 7 5 (Continued) 156 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Table 3. List of authors as per TLS (continued) Item (Author) Documents Citations TLS Item (Author) Documents Citations TLS Munoz- Arcentales A. 1 1 6 Ko E. 1 7 5 Neuts B. 2 26 6 Li L. 2 29 5 Norman- Claesson E. 1 4 6 Martin P. 1 35 5 Pozo A. 1 1 6 Mirchandani D.A. 1 2 5 Quach D.-C. 1 24 6 Ouyang J. 2 5 5 Rahi S. 3 49 6 Piccoli G. 1 35 5 Romão J. 2 26 6 Sahito N. 1 5 5 Sahai A. 3 6 6 Sarkees M.E. 1 7 5 Skilters J. 2 1 6 Tripathi V. 2 7 5 Stallaert J. 3 60 6 Wang W. 2 681 5 Van Leeuwen E. 2 26 6 Watson R.T. 1 35 5 Vasilakos A.V. 1 24 6 Zulkernine F. 1 35 5 Xiong N. 1 24 6 3.6 Co-authorship (countries) We then conducted co-authorship analysis for countries. It was the mapping of associations and affiliations among countries. Our results showed a total of 70 items in which few of the names were not representing any countries. Those names were excluded from the analysis. Thresholds were set as the minimum number of documents of a country was 01 and the minimum number of citations was 00. Maps of connected and not connected sets of items (countries) were shown in Figure 7 and Figure 8. The largest set of connected items (countries) was 47. Its layout values were based on attraction (05) and repulsion (02). For the map of not connected set, attraction and repulsion values were set on 06 and 01, respectively. Result of co-author- ship among countries revealed that United States was far ahead of other countries with total link strength (TLS) of 42 and 76 publications with 5226 citations. It was followed by China (TLS, 20; Documents, 27; Citations, 432) and United Kingdom (TLS, 20; Documents, 23; Citations, 492). The list of all countries and their association strength was mentioned in Table 4. iJIM ‒ Vol. 15, No. 18, 2021 157 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Results also revealed some countries which did not collaborate with other countries in chosen research area. Brazil, Iraq, Denmark, Japan, Poland, Russian Federation, and others mentioned in table were among those countries which had 00 total link strength. Fig. 7. Screenshot of co-authorship (Countries): not connected set Fig. 8. Screenshot of co-authorship (Countries): connected set 158 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Ta bl e 4. L is t o f c ou nt ri es a s pe r T L S It em (C ou nt ry ) D oc um en ts C it at io ns T L S It em (C ou nt ry ) D oc um en ts C it at io ns T L S U ni te d St at es 76 49 2 39 B an gl ad es h 1 4 1 C hi na 27 43 2 20 C hi le 1 4 1 U ni te d K in gd om 23 44 20 E cu ad or 1 11 1 Fr an ce 9 21 7 12 G re ec e 13 15 6 1 C an ad a 13 63 7 10 Ir an 13 95 1 G er m an y 8 47 3 10 Is ra el 2 86 1 Sp ai n 25 24 9 10 K en ya 1 5 1 Pa ki st an 8 0 9 L eb an on 1 8 1 So ut h K or ea 14 71 9 O m an 2 50 1 M al ay si a 16 32 8 8 Pe ru 1 19 1 Ta iw an 51 13 4 8 Q at ar 1 14 1 1 N et he rl an ds 11 59 1 7 Sa ud i A ra bi a 5 10 1 It al y 7 13 3 6 Sr i L an ka 1 52 3 1 K uw ai t 4 28 6 Su da n 1 41 1 A us tr al ia 12 11 57 5 Tu ni si a 4 71 1 C ze ch R ep ub lic 4 18 5 Z im ba bw e 1 25 1 N ew Z ea la nd 4 20 6 5 B ra zi l 2 11 0 Tu rk ey 9 38 5 C ro at ia 1 11 0 V ie t N am 3 52 26 5 D en m ar k 1 32 0 iJIM ‒ Vol. 15, No. 18, 2021 159 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… B el gi um 4 41 6 4 E st on ia 1 11 0 Jo rd an 13 64 4 H un ga ry 1 13 0 Po rt ug al 6 6 4 Ir aq 1 1 0 T ha ila nd 3 17 21 4 Ja pa n 1 10 6 0 E gy pt 5 45 3 L at vi a 2 1 0 Fi nl an d 8 25 5 3 L ith ua ni a 1 7 0 H on g K on g 4 22 5 3 M au ri tiu s 1 1 0 In do ne si a 11 66 3 M on te ne gr o 1 9 0 So ut h A fr ic a 5 7 3 N ig er ia 2 25 0 U ni te d A ra b E m ir at es 4 1 3 N or th M ac ed on ia 3 9 0 In di a 30 25 7 2 Po la nd 2 11 0 N or w ay 3 28 2 R om an ia 1 1 0 Pa le st in e 1 14 1 2 R us si an F ed er at io n 2 19 0 Sw ed en 8 0 2 Sl ov en ia 2 22 0 Sw itz er la nd 5 39 2 U ga nd a 1 56 4 0 B ah ra in 3 11 1 U kr ai ne 1 11 0 160 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… 3.7 Co-occurrence (author keywords) Co-occurrence analysis represents the occurrence of items in a particular document. We executed analysis on author keywords. Minimum occurrence threshold was set on 02 which gave us 194 author keywords out of 1071 for analysis. All the items (keywords) were connected so the largest set of these connected items was shown in Figure 9. The most prominent keywords found were hovering around e-services because it was the central theme. The keyword ‘e-services’ had 498 total link strength which occurred 217 times. It was followed by ‘e-service quality’ (Occurrence, 144; TLS, 362), ‘e-commerce services’ (Occurrence, 49; TLS, 141), ‘customer satisfaction’ (Occurrence, 34; TLS, 113), ‘web services’ (Occurrence, 32; TLS, 105) and ‘e-government services’ (Occur- rence, 47; TLS, 100). Results also showed different services (keywords) which were cooccurred with e-services and e-service quality search. The list of these services was mentioned in Table 5. We divided these services in two formats; ones were those which were related to electronic services and others were common services. The electronic services included online services, digital services, and mobile services. Few electronic services were revealed to have least total link strength (TLS). These would be the interesting avenues for future research directions pertaining to e-services and e-service quality. Online delivery services occurred 02 times with 05 total link strength (TLS), followed by internet services (Occurrence, 02; TLS, 03) and online database services (Occurrence, 02; TLS, 02). Fig. 9. Co-occurrence of author keywords iJIM ‒ Vol. 15, No. 18, 2021 161 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Table 5. Categorization of e-services from co-occurrence of author keywords E-Services Other Services Item (Keyword) Occurrence TLS Item (Keyword) Occurrence TLS e-Commerce Services 49 141 Banking Services 12 44 Web Services 32 105 Tourism Services 6 25 e-Government Services 47 100 Education Services 7 23 e-Banking Services 21 76 Healthcare Services 5 15 e-Retailing Services 12 38 Government Services 3 14 e-Healthcare Services 7 17 Retailing Services 4 14 e-Tourism Services 4 14 Airline Services 2 10 IT Services 4 13 Logistic Services 3 10 ICT Services 5 11 Library Services 4 8 e-Payment Services 4 10 Hotel Services 3 7 e-Tailing Services 3 10 Insurance Services 2 7 e-Communication Services 2 9 Atm Services 2 6 Smart City Services 3 7 Delivery Services 2 6 Online Delivery Services 2 5 Internet Services 2 3 Online Database Services 2 2 3.8 Bibliographic coupling (Documents) We proceed our analysis to bibliographic coupling of documents. Bibliographic cou- pling represents the links between publications. It also indicated the number of citations two publications have in common. We ran this tool on documents, there were other options like sources, authors, countries, and organizations. While executing, we set the minimum number of citations of a document at 00. All the documents (404) met the criteria. The largest set of connected items (documents) was 363 (figure). To make visualization better, attraction value was set at 4 and repul- sion at −2. Figure 10 represented the bibliographic coupling of 363 items (documents/ publications). It was based on the weight of total link strength. The 100 highest scoring TLS documents or publications were listed in Table 6. Stamenkov & Dika, [13] was cited 6 times and had highest TLS (1909) among others, followed by del Águila-Obra et al., [14] and Poon & Lee, [15] [18]. Figure 11 represented the bibliographic coupling map based on citations. It showed the prominence of Parasuraman et al., [11] with 199 links, 552 TLS and 1941 citations. It was highly cited publication in which authors created the multi-item scale that was e-s-qual for measuring e-service quality. 162 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Fig. 10. Screenshot of bibliographic coupling (documents) Fig. 11. Screenshot of bibliographic coupling (documents) on citations iJIM ‒ Vol. 15, No. 18, 2021 163 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Table 6. List of documents from bibliographic coupling as per TLS Item (document) Citations TLS Item (document) Citations TLS Stamenkov G. (2016) [13] 6 1909 Kemény I. (2016) 13 918 Del Águila-Obra A. R. (2013) [14] 0 1906 Lin C.-H. (2010) 17 914 Poon W.-C. (2012) [15] 6 1640 Du J. (2013) 22 909 Shatnawi T. (2019) 5 1629 Mekovec R. (2007) 11 900 Taherdoost H. (2018) 33 1627 Chiu C.-M. (2009) 243 899 Hussien M.I. (2013) 31 1622 Khatib S.M. (2019) 0 896 Gera R. (2011) 20 1606 Wang W. (2019) 4 893 Agrawal V. (2018) 6 1591 Kumar G. (2017) 11 891 Kaur B. (2020a) 3 1585 Lau T.-C. (2011) 13 881 Shankar A. (2020) 2 1584 Tsang N.K.F. (2010) 65 876 Janita M.S. (2013) 60 1544 Yaya L.H.P. (2011) 63 874 Mouakket S. (2012) 30 1499 Rita P. (2019) 43 869 Hsin Chang H. (2011) 157 1489 Finn A. (2009) 61 869 Ladhari R. (2010) 180 1471 Trabelsi-Zoghlami A. (2020) 4 867 Li H. (2015) 23 1442 Han B. (2018) 9 847 Bhati N.S. (2020) 0 1339 Hsu S.-H. (2008) 119 845 Al-Tarawneh K.A. (2012) 13 1334 Chang H.H. (2009) 225 827 Ahmad A. (2016) 23 1316 Kumar A. (2015) 10 819 Lin Y. (2016) 29 1314 Büyüközkan G. (2012) 262 809 Mouakket S. (2014) 7 1265 Benaroch M. (2011) 13 807 Park Y.A. (2007) 85 1258 Belanche D. (2014) 79 798 Kim J.-H. (2020a) 2 1190 Jin J. (2020) 0 797 Al-Nasser M. (2015) 10 1171 Al-Busaidi F.S. (2016) 0 797 Al-Dweeri R.M. (2019) 12 1156 Subramanian N. (2014) 59 788 Menezes L.S. (2016) 8 1140 Al-Ammary J. (2017) 4 772 Stamenkov G. (2015) [13] 21 1132 Etemad-Sajadi R. (2015) 29 772 Giovanis A.N. (2014) 19 1129 Hahn S.-E. (2017) 27 769 Fuentes-Blasco M. (2010) 49 1129 Adil M. (2020) 1 765 Rafiq M. (2012) 28 1117 Luo S.-F. (2011) 9 763 Kaya B. (2019) 17 1114 Liao C.-H. (2011) 37 757 Barrutia J.M. (2009) 18 1110 Zhang X. (2006) 35 739 Lee F.-H. (2011) 49 1105 Castro-Lopez A. (2017) 8 730 Xu J.D. (2013) 199 1094 Carlson J. (2011) 30 727 Siu N.Y.-M. (2010) 6 1083 Kim J.-H. (2020b) 0 720 Lee H. (2009) 88 1077 Hsu T.-H. (2012) 30 719 Dai H. (2020) 1 1072 Rahi S. (2019c) 13 717 Udo G.J. (2010) 213 1051 Ahmad S. (2020) 2 716 (Continued) 164 http://www.i-jim.org Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… Table 6. List of documents from bibliographic coupling as per TLS (continued) Item (document) Citations TLS Item (document) Citations TLS Sardana S. (2020) 1 1049 Moez L. (2013) 5 712 Yarimoglu E.K. (2017) 7 1044 Loukis E. (2012) 30 711 Chen Y.-C. (2017) 8 1041 Hung S.-Y. (2013) 28 704 Sousa R. (2012b) 38 1025 Agrawal V. (2019) 1 695 Al-Adwan A.S. (2019) 5 1012 Kurt S.D. (2012) 19 694 Sousa R. (2012a) 7 1012 Rahi S. (2019b) 17 688 Stiglingh M. (2014) 8 1009 Liljander V. (2006) 226 684 Ali H. (2019) 5 987 Rabinovich E. (2008) 21 683 Kao T.-W. (2016) 28 987 Etemad-Sajadi R. (2014) 14 670 O’cass A. (2012) 40 986 Taherdoost H. (2017) 7 668 Rahman M.S. (2020) 4 964 Featherman M.S. (2010) 34 659 Wu Y.-L. (2012) 16 948 Berbegal-Mirabent J. (2016) 23 654 Pearson A. (2012) 40 944 Bhattacharya D. (2012) 69 653 4 Conclusion, limitations and future research directions This study presented an overview of ‘e-service and e-service quality’ research. It was based on the 404 documents which were retrieved from the Scopus database with the timeline from 2000 to 2020. The field of ‘Business, Management and Accounting’ witnessed the highest number of publications. Total Quality Management and Business Excellence was found at the top among the most productive journals in chosen search. Chang W.-I. and Yuan S.-T. from Taiwan were found to be the leading authors among top ten authors. United States and National Cheng Kung University of Taiwan were found to be the leading country and institution in the selected search of e-service and e-service quality. Bibliometric mapping results revealed Li H., Lu J., and Nijkamp P. were authors who had highest association between other authors, United States was the leading coun- try which had highest associations, collaborations, and affiliations with other coun- tries in authoring the studies. Furthermore, along with central keywords (e-services and e-service quality), e-commerce services, customer satisfaction, web services and e-government services were the most prominent and highly associated keywords found. The current study was not free from limitations. The search term was limited to ‘e-services and e-service quality’ only, therefore, it might not cover all the relevant sub- ject of studies. The current study excluded 2021 year which might include interesting topics in the searched area. Based on the limitations and results, we found that most of the research was done in the field of Business, Management and Accounting, and there was a need to focus on other underexplored areas such as Psychology, Arts and Humanities, Decision Sciences and Engineering. These would be the interesting avenues for future research directions pertaining to e-services and e-service quality. Online delivery services, internet services iJIM ‒ Vol. 15, No. 18, 2021 165 Paper—Everything is Going Electronic, so do Services and Service Quality: Bibliometric Analysis of… and online database services were found least associated with central keywords and fur- ther research was suggested in those services. 5 References [1] X. Li, E. Ma, and H. 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Technol., vol. 14, no. 6, pp. 67–81, 2020, doi: https://doi.org/10.3991/ijim.v14i06.13479 6 Appendix 1 6.1 Search String e-services OR e-service AND quality AND ( LIMIT-TO ( EXACTKEYWORD , “E-services” ) OR LIMIT-TO ( EXACT- KEYWORD , “E-service Quality” ) OR LIMIT-TO ( EXACT- KEYWORD , “E- Services” ) OR LIMIT-TO ( EXACTKEYWORD , “E-service” ) OR LIMIT-TO ( EXACTKEYWORD , “Electronic Services” ) ) AND ( EXCLUDE ( PUBYEAR , 2021 ) ) AND ( LIMIT-TO ( DOCTYPE , “ar” ) ) AND ( LIMIT-TO ( SRC- TYPE , “j” ) ) AND ( LIMIT-TO ( LANGUAGE , “English” ) ) 7 Authors Javed Ali, Department of Business Administration, Sukkur IBA University, Sindh, Pakistan; Azman Hashim International Business School, Universiti Teknologi Malaysia. E-mail: javedali@iba-suk.edu.pk. Ahmad Jusoh, Assoc. Professor and Senior Lecturer, Azman Hashim International Business School, Universiti Teknologi Malaysia. E-mail: ahmadj@utm.my. Norhalimah Idris, Assoc. Professor and Senior Lecturer, Azman Hashim Interna- tional Business School, Universiti Teknologi Malaysia. E-mail: norhalimah@utm.my. Alhamza F. Abbas, Azman Hashim International Business School, Universiti Teknologi Malaysia. E-mail: alhamza.fadil@gmail.com. Ahmed H. Alsharif, Azman Hashim International Business School, Universiti Teknologi Malaysia. E-mail: ahmedalsharif07@gmail.com. Article submitted 2021-06-04. Resubmitted 2021-07-22. Final acceptance 2021-07-29. Final version published as submitted by the authors. iJIM ‒ Vol. 15, No. 18, 2021 167 https://doi.org/10.1080/10599231.2012.690682 https://doi.org/10.3991/ijim.v14i06.13479 mailto:javedali@iba-suk.edu.pk mailto:ahmadj@utm.my mailto:norhalimah@utm.my mailto:alhamza.fadil@gmail.com mailto:ahmedalsharif07@gmail.com