Tourism Research Progress Under the Impact of COVID-19: ——Bibliometric Visualization Analysis based on Citespace

Ahmad, A., Jamaludin, A., Zuraimi, N. S. M., & Valeri, M. (2021). Visit intention and destination image in post-Covid-19 crisis recovery. Current Issues in Tourism, 24(17), 2392–2397. https://doi.org/10.1080/13683500.2020.1842342
Albort-Morant, G., & Ribeiro-Soriano, D. (2016). A bibliometric analysis of international impact of business incubators. Journal of Business Research, 69(5), 1775–1779. https://doi.org/10.1016/j.jbusres.2015.10.054
Arbulu, I., Razumova, M., Rey-Maquieira, J., & Sastre, F. (2021). Can domestic tourism relieve the COVID-19 tourist industry crisis? The case of Spain. Journal of Destination Marketing & Management, 20, 100568. https://doi.org/10.1016/j.jdmm.2021.100568
Bae, S. Y., Chang, P.-J., & Lee, H. (2022). Examining untact tourism behaviour in South Korea during the COVID-19 pandemic: A two-wave longitudinal study (March and September 2020). Asia Pacific Journal of Tourism Research, 27(1), 15–29. https://doi.org/10.1080/10941665.2021.1998157
Banos-Pino, J. F., Boto-Garcia, D., Del Valle, E., & Sustacha, I. (2021). The impact of COVID-19 on tourists’ length of stay and daily expenditures. Tourism Economics, 13548166211053420. https://doi.org/10.1177/13548166211053419
Barna, M., & Semak, B. (2020). Main trends of marketing innovations development of international tour operating. Baltic Journal of Economic Studies, 6(5), 33–41. https://doi.org/10.30525/2256-0742/2020-6-5-33-41
Boto-Garcia, D., & Leoni, V. (2021). Exposure to COVID-19 and travel intentions: Evidence from Spain. Tourism Economics, 1354816621996554. https://doi.org/10.1177/1354816621996554
Breier, M., Kallmuenzer, A., Clauss, T., Gast, J., Kraus, S., & Tiberius, V. (2021). The role of business model innovation in the hospitality industry during the COVID-19 crisis. International Journal of Hospitality Management, 92, 102723. https://doi.org/10.1016/j.ijhm.2020.102723
Butler, G., Szili, G., Cutler, C., Hay, I., & Saikia, U. (2021). Changing Australian leisure mobilities in the COVID-19 pandemic: Exploring the role of automobilities. Leisure Studies, 40(5), 698–713. https://doi.org/10.1080/02614367.2021.1916833
Calder, G., Radic, A., Ryu, H.-S., Ariza-Montes, A., & Han, H. (2022). COVID-19 and pro-environmental behaviour at destinations amongst international travellers. Frontiers in Psychology, 13, 879300. https://doi.org/10.3389/fpsyg.2022.879300
Chen, C. (2016). CiteSpace: A practical guide for mapping scientific literature. Nova Science Publishers Hauppauge, NY, USA.
Chen, Y., Chen, C. M., Liu, Z. Y., Hu, Z. G., & Wang, X. W. (2015). The methodology function of Citespace mapping knowledge domains. Studies in Science of Science, 33(02), 242–253. https://doi.org/10.16192/j.cnki.1003-2053.2015.02.009
Colakoglu, U., Yurcu, G., & Avsar, M. (2021). Social isolation, anxiety, mental well-being and push travel motivation: The case of COVID-19 in Turkey. Asia Pacific Journal of Tourism Research, 26(11), 1173–1188. https://doi.org/10.1080/10941665.2021.1981415
De Bellis, N. (2009). Bibliometrics and citation analysis: From the science citation index to cybermetrics. scarecrow press.
Duan, J., Xie, C., & Morrison, A. M. (2022). Tourism crises and impacts on destinations: A systematic review of the tourism and hospitality literature. Journal of Hospitality & Tourism Research, 46(4), 667–695. https://doi.org/10.1177/1096348021994194
Ekinci, Y., Gursoy, D., Can, A. S., & Williams, N. L. (2022). Does travel desire influence COVID-19 vaccination intentions? Journal of Hospitality Marketing & Management, 31(4), 413–430. https://doi.org/10.1080/19368623.2022.2020701
El-Said, O., & Aziz, H. (2022). Virtual tours a means to an end: An analysis of virtual tours’ role in tourism recovery post COVID-19. Journal of Travel Research, 61(3), 528–548. https://doi.org/10.1177/0047287521997567
Fang, Y., Yin, J., & Wu, B. (2018). Climate change and tourism: A scientometric analysis using CiteSpace. Journal of Sustainable Tourism, 26(1), 108–126. https://doi.org/10.1080/09669582.2017.1329310
Feng, L., Wang, S. B., Tang, H. Y., Yu, X., Li, S. J., Yuan, J. X., & Huang, G. Q. (2021). Knowledge map of rural ecological civilization research based on Citespace visualization analysis. Journal of Ecology and Rural Environment, 37(02), 137–144. https://doi.org/10.19741/j.issn.1673-4831.2020.0442
Foo, L.-P., Chin, M.-Y., Tan, K.-L., & Phuah, K.-T. (2021). The impact of COVID-19 on tourism industry in Malaysia. Current Issues in Tourism, 24(19), 2735–2739. https://doi.org/10.1080/13683500.2020.1777951
Gössling, S., Scott, D., & Hall, C. M. (2020). Pandemics, tourism and global change: A rapid assessment of COVID-19. Journal of sustainable Tourism, 1–20. https://doi.org/10.1080/09669582.2020.1758708
Gursoy, D., Can, A. S., Williams, N., & Ekinci, Y. (2021). Evolving impacts of COVID-19 vaccination intentions on travel intentions. Service Industries Journal, 41(11–12), 719–733. https://doi.org/10.1080/02642069.2021.1938555
Hall, C. M., Scott, D., & Gössling, S. (2020). Pandemics, transformations and tourism: Be careful what you wish for. Tourism Geographies, 22(3), 577–598. https://doi.org/10.1080/14616688.2020.1759131
Huang, G., Zhong, S., & Wong, I. A. (2021). Evolutionary selection for travel agencies under COVID-19 adversity through the lens of life history theory. Journal of Travel & Tourism Marketing, 38(9), 917–934. https://doi.org/10.1080/10548408.2021.2006857
Huertas, A., Oliveira, A., & Girotto, M. (2020). Crisis communication management by the national tourist organizations of Spain and Italy in the face of Covid-19. Profesional De La Informacion, 29(4), e290410. https://doi.org/10.3145/epi.2020.jul.10
Ivanov, S. H., Webster, C., Stoilova, E., & Slobodskoy, D. (2022). Biosecurity, crisis management, automation technologies and economic performance of travel, tourism and hospitality companies—A conceptual framework. Tourism Economics, 28(1), 3–26. https://doi.org/10.1177/1354816620946541
Jiang, S., LIU, B., & Zhang, Z. (2019). Spatial-temporal evolution of tourism income level and tourism competitiveness in African countries. Journal of Subtropical resources and Environment, 14(2), 65–73.
Kartari, A., Ozen, A. E., Correia, A., Wen, J., & Kozak, M. (2021). Impacts of COVID-19 on changing patterns of household food consumption: An intercultural study of three countries. International Journal of Gastronomy and Food Science, 26, 100420. https://doi.org/10.1016/j.ijgfs.2021.100420
Kesgin, M., Can, A. S., Gursoy, D., Ekinci, Y., & Aldawodi, K. (2022). Effects of religiosity and travel desire on COVID-19 vaccination intentions. Current Issues in Tourism. https://doi.org/10.1080/13683500.2022.2026302
Kim, J. J., & Han, H. (2022). Saving the hotel industry: Strategic response to the COVID-19 pandemic, hotel selection analysis, and customer retention. International Journal of Hospitality Management, 102, 103163. https://doi.org/10.1016/j.ijhm.2022.103163
Kim, J., Park, J., Kim, S. (Sam), Gonzalez-Jimenez, H., Kim, J.-E., De Villiers, R., Lee, J. C., & Giroux, M. (2022). The impact of the threat of COVID-19 on visiting intentions as influenced by different destination logos. European Journal of Marketing, 56(3), 738–767. https://doi.org/10.1108/EJM-04-2020-0308
Kim, S. (Sam), Kim, J., Badu-Baiden, F., Giroux, M., & Choi, Y. (2021). Preference for robot service or human service in hotels? Impacts of the COVID-19 pandemic. International Journal of Hospitality Management, 93, 102795. https://doi.org/10.1016/j.ijhm.2020.102795
Lebrun, A.-M., Corbel, R., & Bouchet, P. (2021). Impacts of Covid-19 on travel intention for summer 2020: A trend in proximity tourism mediated by an attitude towards Covid-19. Service Business. https://doi.org/10.1007/s11628-021-00450-z
Lee, H. Y., & Leung, K. Y. K. (2022). Island ferry travel during COVID-19: Charting the recovery of local tourism in Hong Kong. Current Issues in Tourism, 25(1), 76–93. https://doi.org/10.1080/13683500.2021.1911964
Li, J., & Chen, C. M. (2016). Citespace:Text mining and visualization in scientific literature (2nd ?). Capital University of Economics and Business Press.
Li, L., Tao, Z., Lu, L., Liu, H., Zhang, J., & Zhang, M. (2022). The impact of COVID-19 on the regional tourism flow network: An empirical study in Hubei Province. Current Issues in Tourism, 25(2), 287–302. https://doi.org/10.1080/13683500.2021.1937075
Li, X. X., & Shao, Z. Y. (2016). The fast search clustering algorithm based on density-distance and its application in the co-word clustering analysis. Journal of the China Society for Scientific and Technical Information, 35(04), 380–388.
Li, Z., Xiang, Y., & Lu, Q. (2022). Research progress, hot spots and prospects in the field of high-quality development of agricultural economy: Visual analysis based on CiteSpace. Journal of Chinese Agricultural Mechanization, 43(07), 106–115. https://doi.org/10.13733/j.jcam.issn.2095-5553.2022.07.016
Li, Z., Zhao, Q., Huo, T., Shao, Y., & Hu, Z. (2022). COVID-19: Management focus of reopened tourist destinations. Current Issues in Tourism, 25(1), 14–20. https://doi.org/10.1080/13683500.2020.1863926
Liao, H., Tang, M., Luo, L., Li, C., Chiclana, F., & Zeng, X.-J. (2018). A bibliometric analysis and visualization of medical big data research. Sustainability, 10(1), 166. https://doi.org/10.3390/su10010166
Liu, M. T., Wang, S., McCartney, G., & Wong, I. A. (2021). Taking a break is for accomplishing a longer journey: Hospitality industry in Macao under the COVID-19 pandemic. International Journal of Contemporary Hospitality Management, 33(4), 1249–1275. https://doi.org/10.1108/IJCHM-07-2020-0678
Liu, X., Wen, J., Kozak, M., Jiang, Y., & Li, Z. (2022). Negotiating interdisciplinary practice under the COVID-19 crisis: Opportunities and challenges for tourism research. Tourism Review, 77(2), 484–502. https://doi.org/10.1108/TR-01-2021-0034
Liu, X., Yuan, Y., He, J., & Li, Z. (2022). Framing the travel livestreaming in China: A new star rising under the COVID-19. Current Issues in Tourism. https://doi.org/10.1080/13683500.2021.2023115
Lu, J., Xiao, X., Xu, Z., Wang, C., Zhang, M., & Zhou, Y. (2022). The potential of virtual tourism in the recovery of tourism industry during the COVID-19 pandemic. Current Issues in Tourism, 25(3), 441–457. https://doi.org/10.1080/13683500.2021.1959526
Lu, Q., & Atadil, H. A. (2021). Do you dare to travel to China? An examination of China’s destination image amid the COVID-19. Tourism Management Perspectives, 40, 100881. https://doi.org/10.1016/j.tmp.2021.100881
Marques, C. P., Guedes, A., & Bento, R. (2022). Rural tourism recovery between two COVID-19 waves: The case of Portugal. Current Issues in Tourism, 25(6), 857–863. https://doi.org/10.1080/13683500.2021.1910216
Mirehie, M., & Cho, I. (2022). Exploring the effects of the COVID-19 pandemic on sport tourism. International Journal of Sports Marketing & Sponsorship, 23(3), 527–546. https://doi.org/10.1108/IJSMS-04-2021-0081
Moon, H., Lho, L., & Han, H. (2021). Self-check-in kiosk quality and airline non-contact service maximization: How to win air traveler satisfaction and loyalty in the post-pandemic world? Journal of Travel & Tourism Marketing, 38, 383–398. https://doi.org/10.1080/10548408.2021.1921096
Moya Calderon, M., Chavarria Esquivel, K., Arrieta Garcia, M. M., & Barriocanal Lozano, C. (2022). Tourist behaviour and dynamics of domestic tourism in times of COVID-19. Current Issues in Tourism, 25(14), 2207–2211. https://doi.org/10.1080/13683500.2021.1947993
Ndou, V., Mele, G., Hysa, E., & Manta, O. (2022). Exploiting technology to deal with the COVID-19 challenges in travel & tourism: A bibliometric analysis. Sustainability, 14(10), Art. 10. https://doi.org/10.3390/su14105917
Nunkoo, R., Daronkola, H. K., & Gholipour, H. F. (2022). Does domestic tourism influence COVID-19 cases and deaths? Current Issues in Tourism, 25(3), 338–351. https://doi.org/10.1080/13683500.2021.1960283
Ouyang, W., Wang, Y., Lin, C., He, M., Hao, F., Liu, H., & Zhu, W. (2018). Heavy metal loss from agricultural watershed to aquatic system: A scientometrics review. Science of the Total Environment, 637, 208–220. https://doi.org/10.1016/j.scitotenv.2018.04.434
Pan, T., Shu, F., Kitterlin-Lynch, M., & Beckman, E. (2021). Perceptions of cruise travel during the COVID-19 pandemic: Market recovery strategies for cruise businesses in North America. Tourism Management, 85, 104275.
https://doi.org/10.1016/j.tourman.2020.104275
Park, I.-J., Kim, J., Kim, S. (Sam), Lee, J. C., & Giroux, M. (2021). Impact of the COVID-19 pandemic on travelers’ preference for crowded versus non-crowded options. Tourism Management, 87, 104398. https://doi.org/10.1016/j.tourman.2021.104398
Park, S., Kim, Y. R., & Ho, C. S. T. (2022). Analysis of travel mobility under Covid-19: Application of network science. Journal of Travel & Tourism Marketing, 39(3), 335–352. https://doi.org/10.1080/10548408.2022.2089954
Provenzano, D., & Volo, S. (2022). Tourism recovery amid COVID-19: The case of Lombardy, Italy. Tourism Economics, 28(1), 110–130.
https://doi.org/10.1177/13548166211039702
Quang, T. D., Tran, T. C., Tran, V. H., Nguyen, T. T., & Nguyen, T. T. (2022). Is Vietnam ready to welcome tourists back? Assessing COVID-19’s economic impact and the Vietnamese tourism industry’s response to the pandemic. Current Issues in Tourism, 25(1), 115–133. https://doi.org/10.1080/13683500.2020.1860916
Quintal, V., Sung, B., & Lee, S. (2022). Is the coast clear? Trust, risk-reducing behaviours and anxiety toward cruise travel in the wake of COVID-19. Current Issues in Tourism, 25(2), 206–218. https://doi.org/10.1080/13683500.2021.1880377
Radic, A., Luck, M., Al-Ansi, A., Chua, B.-L., Seeler, S., Raposo, A., Kim, J. J., & Han, H. (2021). To dine, or not to dine on a cruise ship in the time of the COVID-19 pandemic: The tripartite approach towards an understanding of behavioral intentions among female passengers. Sustainability, 13(5), 2516. https://doi.org/10.3390/su13052516
Rahmafitria, F., Suryadi, K., Oktadiana, H., Putro, H. P. H., & Rosyidie, A. (2021). Applying knowledge, social concern and perceived risk in planned behavior theory for tourism in the Covid-19 pandemic. Tourism Review, 76(4), 809–828. https://doi.org/10.1108/TR-11-2020-0542
Rasoolimanesh, S. M., Seyfi, S., Rastegar, R., & Hall, C. M. (2021). Destination image during the COVID-19 pandemic and future travel behavior: The moderating role of past experience. Journal of Destination Marketing & Management, 21, 100620. https://doi.org/10.1016/j.jdmm.2021.100620
Rastegar, R., Higgins-Desbiolles, F., & Ruhanen, L. (2021). COVID-19 and a justice framework to guide tourism recovery. Annals of Tourism Research, 91, 103161. https://doi.org/10.1016/j.annals.2021.103161
Rastegar, R., Seyfi, S., & Rasoolimanesh, S. M. (2021). How COVID-19 case fatality rates have shaped perceptions and travel intention? Journal of Hospitality and Tourism Management, 47, 353–364. https://doi.org/10.1016/j.jhtm.2021.04.006
Rogerson, C. M., & Baum, T. (2020). COVID-19 and African tourism research agendas. Development Southern Africa, 37(5), 727–741.
https://doi.org/10.1080/0376835X.2020.1818551
Seraphin, H. (2020). COVID-19 and the acknowledgement of children as stakeholders of the tourism industry. Anatolia, 32(10), 152–156.
https://doi.org/10.1080/13032917.2020.1856690
Seraphin, H., & Dosquet, F. (2020). Mountain tourism and second home tourism as post COVID-19 lockdown placebo? Worldwide Hospitality and Tourism Themes, 12(4), 485–500. https://doi.org/10.1108/WHATT-05-2020-0027
Shao, Y., Hu, Z., Luo, M., Huo, T., & Zhao, Q. (2021). What is the policy focus for tourism recovery after the outbreak of COVID-19? A co-word analysis. Current Issues in Tourism, 24(7), 899–904. https://doi.org/10.1080/13683500.2020.1806798
Shapoval, V., Hagglund, P., Pizam, A., Abraham, V., Carlback, M., Nygren, T., & Smith, R. M. (2021). The COVID-19 pandemic effects on the hospitality industry using social systems theory: A multi-country comparison. International Journal of Hospitality Management, 94, 102813. https://doi.org/10.1016/j.ijhm.2020.102813
Shekari, F., & Azizi, F. (2022). Exploring the factors affecting travel intention during the COVID-19 pandemic: A structural analysis. Iranian Journal of Management Studies, 15(3), 613–632.
Srivastava, P. R., Sengupta, K., Kumar, A., Biswas, B., & Ishizaka, A. (2022). Post-epidemic factors influencing customer’s booking intent for a hotel or leisure spot: An empirical study. Journal of Enterprise Information Management, 35(1), 78–99. https://doi.org/10.1108/JEIM-03-2021-0137
Su, D. N., Tran, K. P. T., Nguyen, L. N. T., Thai, T. H. T., Doan, T. H. T., & Tran, V. T. (2022). Modeling behavioral intention toward traveling in times of a health-related crisis. Journal of Vacation Marketing, 28(2), 135–151.
https://doi.org/10.1177/13567667211024703
Sun, Z. B., & Zhang, H. J. (2017). Research on co-word analysis method based on semantic similarity. Journal of Library Science, 39(01), 74–79.
https://doi.org/10.14037/j.cnki.tsgxk.2017.01.018
Teeroovengadum, V., Seetanah, B., Bindah, E., Pooloo, A., & Veerasawmy, I. (2021). Minimising perceived travel risk in the aftermath of the COVID-19 pandemic to boost travel and tourism. Tourism Review, 76(4), 910–928. https://doi.org/10.1108/TR-05-2020-0195
UNWTO. (2021). Tourism barometer and statistical Annex.
Vaishar, A., & Stastna, M. (2022). Impact of the COVID-19 pandemic on rural tourism in Czechia Preliminary considerations. Current Issues in Tourism, 25(2), 187–191. https://doi.org/10.1080/13683500.2020.1839027
Volgger, M., Taplin, R., & Aebli, A. (2021). Recovery of domestic tourism during the COVID-19 pandemic: An experimental comparison of interventions. Journal of Hospitality and Tourism Management, 48, 428–440. https://doi.org/10.1016/j.jhtm.2021.07.015
Vu, K., & Hartley, K. (2022). Drivers of growth and catch-up in the tourism sector of industrialized economies. Journal of Travel Research, 61(5), 1156–1172. https://doi.org/10.1177/00472875211019478
Wang, D., Kotsi, F., Mathmann, F., Yao, J., & Pike, S. (2022). Short break drive holiday destination attractiveness during COVID-19 border closures. Journal of Hospitality and Tourism Management, 51, 568–577. https://doi.org/10.1016/j.jhtm.2022.05.013
Wang, J., & Xia, L. (2021). Revenge travel: Nostalgia and desire for leisure travel post COVID-19. Journal of Travel & Tourism Marketing, 38(9), 935–955. https://doi.org/10.1080/10548408.2021.2006858
Wen, J., Kozak, M., Yang, S., & Liu, F. (2021). COVID-19: Potential effects on Chinese citizens’ lifestyle and travel. Tourism Review, 76(1), 74–87. https://doi.org/10.1108/TR-03-2020-0110
World Travel and Tourism Council. (2018). Travel&tourism economic impact 2018 South Africa. World Travle and Tourism Council.
Xie, C., Zhang, J., Morrison, A. M., & Coca-Stefaniak, J. A. (2021). The effects of risk message frames on post-pandemic travel intentions: The moderation of empathy and perceived waiting time. Current Issues in Tourism, 24(23), 3387–3406. https://doi.org/10.1080/13683500.2021.1881052
Ye, N., Kueh, T.-B., Hou, L., Liu, Y., & Yu, H. (2020). A bibliometric analysis of corporate social responsibility in sustainable development. Journal of Cleaner Production, 272, 122679. https://doi.org/10.1016/j.jclepro.2020.122679
Yeh, S.-S. (2021). Tourism recovery strategy against COVID-19 pandemic. Tourism Recreation Research, 46(2), 188–194. https://doi.org/10.1080/02508281.2020.1805933
Yu, D., Xu, Z., Pedrycz, W., & Wang, W. (2017). Information sciences 1968-2016: A retrospective analysis with text mining and bibliometric. Information Sciences, 418, 619–634. https://doi.org/10.1016/j.ins.2017.08.031
Zeng, Z., Chen, P.-J., & Lew, A. A. (2020). From high-touch to high-tech: COVID-19 drives robotics adoption. Tourism Geographies, 22(3), 724–734. https://doi.org/10.1080/14616688.2020.1762118
Zhang, H., & Lu, J. (2022). Forecasting hotel room demand amid COVID-19. Tourism Economics, 28(1), 200–221. https://doi.org/10.1177/13548166211035569
Zhang, J., Xie, C., & Morrison, A. M. (2021). The effect of corporate social responsibility on hotel employee safety behavior during COVID-19: The moderation of belief restoration and negative emotions. Journal of Hospitality and Tourism Management, 46, 233–243. https://doi.org/10.1016/j.jhtm.2020.12.011
Zhang, J., Xie, C., Wang, J., Morrison, A. M., & Coca-Stefaniak, J. A. (2020). Responding to a major global crisis: The effects of hotel safety leadership on employee safety behavior during COVID-19. International Journal of Contemporary Hospitality Management, 32(11), 3365–3389. https://doi.org/10.1108/IJCHM-04-2020-0335
Zhang, L. B. (2017). Information analysis methods and practice. Northeast Normal University Press.
Zhang, X., Xie, Q., Song, C., & Song, M. (2022). Mining the evolutionary process of knowledge through multiple relationships between keywords. Scientometrics, 127(4), 2023–2053. https://doi.org/10.1007/s11192-022-04272-2
Zhang, Y., Lingyi, M., Peixue, L., Lu, Y., & Zhang, J. (2021). COVID-19’s impact on tourism: Will compensatory travel intention appear? Asia Pacific Journal of Tourism Research, 26(7), 732–747. https://doi.org/10.1080/10941665.2021.1908383
Zhong, L., Sun, S., Law, R., & Li, X. (2021). Tourism crisis management: Evidence from COVID-19. Current Issues in Tourism, 24(19), 2671–2682.
https://doi.org/10.1080/13683500.2021.1901866
Zhu, J., & Hua, W. (2017). Visualizing the knowledge domain of sustainable development research between 1987 and 2015: A bibliometric analysis. Scientometrics, 110(2), 893–914. https://doi.org/10.1007/s11192-016-2187-8

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To Cite this Article: Xin, W. Y., Hizam-Hanafiah, M., & Yin, Z. (2022). Tourism Research Progress Under the Impact of COVID-19: ——Bibliometric Visualization Analysis based on Citespace. International Journal of Academic Research in Business and Social Sciences, 12(12), 1374 – 1394.

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