The Consistency of the Sufficiency Economy Philosophy (SEP) with Sustainable Development Goals (SDGs)

Authors

  • Tachakorn Wongkumchai Information Technology Management, Faculty of Engineering, Mahidol University, Salaya, Phuttamonthon, NakhonPathom, Thailand https://orcid.org/0000-0001-6202-3484
  • Smitti Darakorn Na Ayuthaya Information Technology Management, Faculty of Engineering, Mahidol University, Salaya, Phuttamonthon, NakhonPathom, Thailand
  • Supaporn Kiattisin Information Technology Management, Faculty of Engineering, Mahidol University, Salaya, Phuttamonthon, NakhonPathom, Thailand https://orcid.org/0000-0002-7776-643X

DOI:

https://doi.org/10.13052/jmm1550-4646.1641

Keywords:

consistency, sufficiency economy philosophy, sustainable development goals, sustainable agriculture

Abstract

The purpose is to find the consistency of the SEP with SDGs. The sample used in this research was from development projects based on the application of the SEP with the total of 1,677 projects. These 1,667 projects were compared to the Taro Yamane table at a 95% confidence level with a deviation of 0.02. In addition, the sample of 10 projects under the framework of South-South cooperation and the Triangular cooperation were purposively selected. Questionnaires were used as the research tools to obtain opinions of experts consistency of the SEP to the dimensions of economic, social, and environmental development with the SDGs. The accuracy of the questionnaires is 0.88. The data were analyzed using Decision Matrix Analysis, Pearson's correlation, percentage, and average. The results showed that sustainable development based on the application of the SEP was consistent with SDGs in 3 dimensions: environmental at 28.40% ( = 4.73), economic at 27.14% ( = 4.52), and social at 26.08% ( = 4.35). The SEP is positively consistent with SDGs at 42.33% (r = 0.42325), which suggests that more implementation of development projects in accordance with the SEP leads to more development towards SDGs in each dimension.

Downloads

Download data is not yet available.

Author Biographies

Tachakorn Wongkumchai, Information Technology Management, Faculty of Engineering, Mahidol University, Salaya, Phuttamonthon, NakhonPathom, Thailand

Tachakorn Wongkumchai is a Ph.D. student in Information Technology Management at Mahidol University, Nakhon Pathom, Thailand. He received the bachelor degree in industrial technology (computer industrial) from Ubon Ratchathani Rajabhat University, Ubon Ratchathani, Thailand, in 2003, and the master degree in computer and information technology from King Mongkut’s University of Technology Thonburi, Bangkok, Thailand, in 2006. His research interests include sustainable development, community development, analysis and evaluation of the local economy, digital economy, business process management, project management, and management information systems. He is dean of the Faculty management of science, Dhonburi Rajabhat university, Bangkok, Thailand, in 2017–2021. He has certificate of MTA: introduction to programming using HTML and CSS, MTA: HTML5 application development fundamentals, and IC3 GS5 Spark.

Smitti Darakorn Na Ayuthaya, Information Technology Management, Faculty of Engineering, Mahidol University, Salaya, Phuttamonthon, NakhonPathom, Thailand

Smitti Darakorn Na Ayuthaya received the bachelor degree in economics from the University of the Thai Chamber of Commerce Bangkok, Thailand, in 1980, the certificate in marketing and sale Colorado State of University, in 1983, the master degree in innovation management from Ramkhamhaeng University, Thailand, in 2007, and the D.P.A. degree in public administration form University of Philippines, Philippines, in 2010. He is currently the program director of M.Sc. program in Information Technology Management, and lecturer in Ph.D. program in Information Technology Management, Faculty of Engineering, Mahidol University, Thailand. His research interests include digital economy, macro/micro economic, e-logistic, ecommerce, start-up and university business incubator (UBI), innovative business engineering, economy value management, business process management, project management, strategy management/planning, human resource management, and marketing and selling. He has the experience of consult in development village e-Commerce of Thailand Digital Economy, Ministry of Digital Economy and Society, ICT planning & enterprise architecture of Bangkok Metropolitan Administration, energy enterprise architecture of National Research Council of Thailand, digital literacy Thailand of Ministry of Information Communication Technology (ICT), and other. He has certificate of CompTIA Project+, CompTIA CTT+ (Soft Skill), and CompTIA Cloud+.

Supaporn Kiattisin, Information Technology Management, Faculty of Engineering, Mahidol University, Salaya, Phuttamonthon, NakhonPathom, Thailand

Supaporn Kiattisin received her B.Eng. degree in applied computer engineering from the Chiang Mai University, Chiang Mai, Thailand, in 1995. She also received her M.Eng. degree in electrical engineering and the Ph.D. degree in electrical and computer engineering from the King Mongkut’s University of Technology Thonburi, Bangkok, Thailand, in 1998 and 2006, respectively. She is currently the program director of Technology of Information System Management Division, Faculty of Engineering, Mahidol University, Thailand. Her research interests include computer vision, image processing, robot vision, signal processing, pattern recognition, artificial intelligence, IoT, IT management, digital technologies, big data, and enterprise architecture with TOGAF 9 certification. She is a member of the IEICE and TESA. She served as a Head of the IEEE Thailand Chapter in Biomedical Engineering. She also served as the Chairman of the TimesSOC Transaction Thailand. She has expertise in Enterprise enterprise Architecture architecture (EA), data sciences, and information technology in E-government and digital economy (DE).

References

Rossi, A. (2012). Turning Red Rural Landscapes Yellow? Sufficiency Economy and Royal Projects in the Hills of Nan Province, Northern Thailand. ASEAS – Austrian Journal of South-East Asian Studies, 5(2), 275–291.

Naipinit, A., Sakolnakorn, T. P., & Kroeksakul, P. (2014). Sufficiency economy for social and environmental sustainability: A case study of four villages in rural Thailand. Asian Social Science, 10(2), 102–111.

Thongpakde, N. (2007). Sufficiency Economy Philosophy : Historical Background and Interpretation. NIDA Development Journal, 47(1/2007), 1–25.

Mongsawad, P. (2010). The Philosophy of the Sufficiency Economy: a Contribution to the Theory of Development. Asia-Pacific Development Journal, 17(1), 123–143.

Pengpinit, T., & Lamom, T. (2011). A Development of a Model to Drive Sufficiency Economy Philosophy Among Local Philosophers and Multilateral Networks in the Northeast. Journal of Community Development Research, 4(1), 79–91.

Boonrat, S., & Kovitarttwatee, P. (2018). The Development of the Country with the Philosophy of a Sufficient Philosophy in the Era of Thailand 4.0. Journal of MCU Buddhapanya Review, 3(2), 197–206. Retrieved January 8, 2020, from https://www.tci-thaijo.org/index.php/PRIJNR/article/view/184284/160672

Baker, C. (2007). Thailand Human Development Report. Sufficiency Economy and Human Development. Bangkok: United Nations Development Programme [UNDP].

NESDB. (2020, January 8). 29 images 2559 images images images images. Retrieved from Office of the National Economic and Social Development Council: https://www.nesdb.go.th/ewt_w3c/ewt_news.php?nid=6280&filename=.

Nations, U. (2015, October 21). General Assembly. Retrieved January 8, 2020, from United Nations Population Fund: https://www.unfpa.org/sites/default/files/resource-pdf/Resolution_A_RES_70_1_EN.pdf.

Foundation, T. S. (2019). A Call to Action: Thailand and the Sustainable Development Goals. Bangkok: Sustainable Development and Sufficiency Economy Studies Center.

ORDPB. (2019, June). The Royal Development Projects. Retrieved January 8, 2020, from Office of the Royal Development Projects Board: http://www.rdpb.go.th/rdpb/projectData/index.htm.

TICA, T. (2018, March 27). SEP for SDGs Partnership. Retrieved January 8, 2020, from Thailand International Cooperation Agency (TICA): http://tica.thaigov.net/main/en/business/6296/70134-TICA-and-SEP-for-SDGs-Partnership.html

NESDC. (2003, June 30). images. Retrieved January 21, 2020, from Office of the National Economic and Social Development Council: https://www.nesdb.go.th/download/article/article_20150813133735.pdf.

Nations, U. D. (2020, January 21). Challenges to Sustainable Development. Retrieved January 21, 2020, from United Nations Department of Economic and Social AffairsDESA: https://www.un.org/en/development/desa/financial-crisis/sustainable-development.html.

Prachachat. (2018, August 7). images. Retrieved January 8, 2020, from prachachat: https://www.prachachat.net/csr-hr/news-201314.

Kalyanamitra, P. (2016). The Development of Social Capital According to the Sustainable Development of Sufficiency Economy. VRU Research and Development Journal Humanities and Social Science, 11(3), 305–316. Retrieved January 21, 2020, from https://www.tci-thaijo.org/index.php/vrurdihsjournal/article/view/74008/59756.

Jitsuchon, S. (2018). Monitoring Development Sustainability through Sustainable Community Indicators. In Multidisciplinary Digital Publishing Institute Proceedings, 2(22), 1396. doi:10.3390/proceedings222 1396.

Wibulswasdi, C., Piboolsravut, P., & Pootrakool, K. (2010). Sufficiency Economy Philosophy and Development. Sufficiency Economy Research Project: Bureau of The Crown Property.

Suthasinobol, K. (2013). The Development of Integrated Instructional Model Based on Buddhist Principles Reflects Sufficiency Economy Philosophy in Context of Modern Thai Society. Journal of Behavioral Science for Development, 5(1), 149–164.

Phanlertphanij, S. (2018). The Development of Leadership in accordance with Sufficiency Economy Philosophy. Journal of SaengKhom Kham Buddhist Studies, 3(1), 86–97.

Inprom, C. (2018). Sufficiency and the New Theory applied to a One-Rai Plot of Land Generating an Income of 100,000 Baht. Journal of Social Development, 20(2), 1–15.

chomsoda, c., teamkeaw, e., & tatiwat, o. (2017). A Prototype of Management System for Sufficiency Economy Village through Responsive Web. TNI Journal of Engineering and Technology, 5(2), 36–42.

Bhanthumnavin, D. (2017). Four Decades of Mobilizing The Philosophy of Sufficiency Economy in Psycho-Behavioral Science. Journal of Social Development, 19(1), 1–21.

Samukkhethum, S. (2018). Sufficiency Thinking: Thailand’s Gift to an Unsustainable World. Journal of Social, 20(2), 173–178.

Somayeh, Z., Azmi, A., Monavari, S. M., & Sobhanardakani, S. (2017). Evaluation and prediction of sustainability of urban areas: A case study for Kermanshah city, Iran. Cities, 66, 1–9.

Sukpan, B. O., ChayaWatana, G., Suthon, R., Vareesangthip, J., Noochaiyanan, C., & Karunaritthiyothin, K. (2019). Communication Pattern of Saving Co-Operativein Promoting Quality of Life with Principles and Sufficiency Economy Philosophy for Stable and Sustainables living. The Journal of Research and Academics, 2(3), 35–52.

ORDPB. (2020, March 21). Royal Development Projects. Retrieved March 21, 2020, from Office of the Royal Development Projects Board (ORDPB): http://www.rdpb.go.th/en/Projects/project-categories-c54

Emas, R. (2015). The Concept of Sustainable Development: Definition and Defining. Florida International University: Brief for GSDR 2015.

Harris, J. M. (2009). Basic principles of sustainable development. In Dimensions of Sustainable Development (Vol. I, p. 25). Oxford, United Kingdom: Eolss Publishers/UNESCO.

Elliott, J. (2013). An Introduction to Sustainable Development (Fourth ed.). New York: Routledge.

Loor Alcívar, I., González Santa Cruz, F., Moreira Mero, N., & Hidalgo-Fernández, A. (2020). Study of Corporate Sustainability Dimensions in the Cooperatives of Ecuador. Sustainability, 12(2), 462. doi:10.3390/su12020462.

Baumgartner, R. J. (2014). Managing Corporate Sustainability and CSR: A Conceptual Framework Combining Values, Strategies and Instruments Contributing to Sustainable Development. Corporate Social Responsibility and Environmental Management, 21(5), 258–271. doi:10.1002/csr.1336.

Meister, M., & Jap, P. M. (1998). Sustainable development and the global economy: rhetorical implications for improving the quality of life. Communication Research, 25(4), 399–421. doi:10.1177/ 009365098025004004.

Lozano, R. (2008). Envisioning sustainability three-dimensionally. Journal of cleaner production, 16(17), 1838–1846. doi:10.1016/j.jclepro.200 8.02.008.

Purvis, B., Mao, Y., & Robinson, D. (2019). Three pillars of sustainability: in search of conceptual origins. Sustainability science, 14, 681–695. doi:10.1007/s11625-018-0627-5.

De Oliveira, G., Brunsell, N. A., Shimabukuro, Y. E., & dos Santos, C. A. (2020). Prologue: Sustainable Development, Economic Growth and the Fate of Tropical Forests. In M. N. Suratman, & M. N. Suratman (Ed.), Forest Degradation Around the World (p. 38). London: IntechOpen. doi:10.5772/intechopen.90648.

Li, M., Fu, Q., P. Singh, V., Liu, D., Li, T., & Zhou, Y. (2020). Managing agricultural water and land resources with tradeoff between economic, environmental, and social considerations: A multi-objective non-linear optimization model under uncertainty. Agricultural Systems, 178, 102685. doi:10.1016/j.agsy.2019.102685.

Farnad, N., Ghayoumian, M., Khanzadi, M., & Rostamnezhad Cherati, M. (2020). Modelling the social dimension of sustainable development using fuzzy cognitive maps. International Journal of Construction Management, 20(3), 223–236. doi:10.1080/15623599.2018.1484847.

Sangwan, S. R., & Bhatia, M. (2020). Sustainable Development in Industry 4.0. In A Roadmap to Industry 4.0: Smart Production, Sharp Business and Sustainable Development. Springer, 39–56. doi:10.1007/978-3-030-14544-6_3.

Syaifudin, N., & Wu, Y. (2020). Sustainable Development in Indonesian Regions: Towards an Assessment. In: Khaiter P., Erechtchoukova M. (eds) Sustainability Perspectives: Science , Policy and Practice. Strategies for Sustainability. Springer, 41–61. doi:10.1007/978-3-030-19550-2_3.

Hak, T., Janouskova, S., & Moldan, B. (2016). Sustainable Development Goals: A need for relevant indicators. Ecological Indicators, 60, 565–573. doi:10.1016/j.ecolind.2015.08.003.

Nations, U. (2020, March 22). Sustainable Development Goals. Retrieved March 22, 2020, from United Nations: https://sustainabledevelopment.un.org/sdgs.

Aust, V., Morais, A., & Pinto, I. (2020). How does foreign direct investment contribute to Sustainable Development Goals? Evidence from African countries. Journal of Cleaner Production, 245, 118823. doi:10.1016/j.jclepro.2019.118823.

Lu, Y., Geng, Y., Liu, Z., Cote, R., & Yu, X. (2017). Measuring sustainability at the community level: An overview of China’s indicator system on National Demonstration Sustainable Communities. Journal of Cleaner Production, 326–335. doi:10.1016/j.jclepro.2016.12.105.

Hashemi, N., & Ghaffary, G. (2017). A Proposed Sustainable Rural Development Index (SRDI): Lessons from Hajij village, Iran. Tourism Management, 59, 130–138. doi:10.1016/j.tourman.2016.07.021.

Ahvenniemi, H., Huovila, A., Seppä, I., & Airaksinen, M. (2017). What are the differences between sustainable and smart cities? Cities, 60, 234–245. doi:10.1016/j.cities.2016.09.009.

Nations, U. (2020, March 22). Sustainable Development Goals. Retrieved March 22, 2020, from United Nations: https://sustainabledevelopment.un.org/sdgs.

Horne, J., Recker, M., Michelfelder, I., Jay, J., & Kratzer, J. (2020). Exploring entrepreneurship related to the sustainable development goals - mapping new venture activities with semi-automated content analysis. Journal of Cleaner Production, 242, 118052. doi:10.1016/j.jclepro.2019.118052.

Ho, L., & Goethals, P. (2019). Opportunities and Challenges for the Sustainability of Lakes and Reservoirs in Relation to the Sustainable Development Goals (SDGs). Water, 11(7), 1462. doi:10.3390/w11071462.

Dhahri, S., & Omri, A. (2020). Are international capital flows really matter for achieving SDGs 1 and 2: ending poverty and hunger? Review of World Economics, 1–37. doi:10.1007/s10290-020-00376-0.

Blesh, J. M., Hoey, L., Jones, A. D., Friedmann, H., & Perfecto, I. (2019). Development pathways toward “zero hunger”. World Development, 118, 1–14. doi:10.1016/j.worlddev.2019.02.004.

Howden-Chapman, P., Siri, J., Chisholm, E., Chapman, R., N.H. Doll, C., & Capon, A. (2017). SDG 3 Ensure healthy lives and promote wellbeing for all at all ages. A guide to SDG interactions: from science to implementation. Int Counc Sci, 81–124. Retrieved from International Science Council: https://council.science/wp-content/uploads/2017/03/SDGs-interactions-3-healthy-lives.pdf.

Sinha, A., Sengupta, T., & Alvarado, R. (2020). Interplay between technological innovation and environmental quality: Formulating the SDG policies for next 11 economies. Journal of Cleaner Production, 242, 118549. doi:10.1016/j.jclepro.2019.118549.

Razavi, S. (2016). The 2030 Agenda: challenges of implementation to attain gender equality and women’s rights. Gender & Development, 24(1), 25–41. doi:10.1080/13552074.2016.1142229.

Han, M., Hashemi, S., Joo, S. H., & Kim, T. (2016). Novel integrated systems for controlling and prevention of mosquito-borne diseases caused by poor sanitation and improper water management. Journal of Environmental Chemical Engineering, 4(4), 3718–3723. doi:10.1016/j.jece.2016.08.013.

Hillerbrand, R. (2018). Why affordable clean energy is not enough. A capability perspective on the sustainable development goals. Sustainability, 10(7), 2485. doi:10.3390/su10072485.

Rai, S. M., Brown, B. D., & Ruwanpura, K. N. (2019). SDG 8: Decent work and economic growth – A gendered analysis. World Development, 113, 368–380. doi:10.1016/j.worlddev.2018.09.006.

Denoncourt, J. (2020). Companies and UN 2030 Sustainable Development Goal 9 Industry, Innovation and Infrastructure. Journal of Corporate Law Studies, 20(1), 199–235. doi:10.1080/14735970.2019.1652027.

MacNaughton, G. (2017). Vertical inequalities: are the SDGs and human rights up to the challenges? The International Journal of Human Rights, 21(8), 1050–1072. doi:10.1080/13642987.2017.1348697.

Zoomers, A., Noorloos, F., Otsuki, K., Steel, G., & Westen, G. v. (2017). The Rush for Land in an Urbanizing World: From Land Grabbing Toward Developing Safe, Resilient, and Sustainable Cities and Landscapes. World Development, 92, 242–252. doi:10.1016/ j.worlddev.2016.11.016.

Bengtsson, M., Alfredsson, E., Cohen, M., Lorek, S., & Schroeder, P. (2018). Transforming systems of consumption and production for achieving the sustainable development goals: moving beyond efficiency. Sustainability Science, 13, 1533–1547. doi:10.1007/s11625-018-0582-1.

Campbell, B. M., Hansen, J., Rioux, J., Stirling, C. M., Twomlow, S., & Wollenberg, E. (2018). Urgent action to combat climate change and its impacts (SDG 13): transforming agriculture and food systems. Current opinion in environmental sustainability, 34, 13–20. doi:10.1016/j.cosust.2018.06.005.

Mugagga, F., & Nabaasa, B. B. (2016). The centrality of water resources to the realization of Sustainable Development Goals (SDG). A review of potentials and constraints on the African continent. International Soil and Water Conservation Research, 4(3), 215–223. doi:10.1016/j.iswcr.2016.05.004.

Andrew, D. (2017). Trade and Sustainable Development Goal (SDG) 15: Promoting “Life on Land” through Mandatory and Voluntary Approaches.

Hope Sr, K. (2020). Peace, justice and inclusive institutions: overcoming challenges to the implementation of Sustainable Development Goal 16. Global Change, Peace & Security, 32(1), 57–77. doi:10.1080/14781158.2019.1667320.

Kumar, S., Kumar, N., & Vivekadhish, S. (2016). Millennium Development Goals (MDGs) to Sustainable Development Goals (SDGs): Addressing Unfinished Agenda and Strengthening Sustainable Development and Partnership. Indian journal of community medicine, 41(1), 1–4. doi:10.4103/0970–0218.170955.

Assembly, G. (2015). Resolution adopted by the General Assembly on 1 September 2015. A/RES/69/315 15 September 2015. New York: United Nations. Retrieved March 25, 2020, from https://www.unescwa.org/sites/www.unescwa.org/files/un_resolutions/a_res_69_315_e.pdf.

Schneider, F., Kläy, A., Zimmermann, A. B., Buser, T., Ingalls, M., & Messerli, P. (2019). How can science support the 2030 Agenda for Sustainable Development? Four tasks to tackle the normative dimension of sustainability. Sustainability Science, 14, 1593–1604. doi:10.1007/s11625-019-00675-y.

Memanvit, A. (2017, November 14). SEP for SDGs Partnership. Retrieved March 25, 2020, from Thailand International Cooperation Agency (TICA): http://tica.thaigov.net/main/contents/files/business-20171218-143625-368717.pdf.

Chaiyasan, A. (2017, November 13). SEP for SDGs Partnership. Retrieved March 25, 2020, from Thailand International Cooperation Agency (TICA): http://tica.thaigov.net/main/contents/files/business-20171218-143413-065490.pdf.

TICA. (2018, March 29). SEP for SDGs Partnership : Development Diplomacy and SEP for SDGs Partnership. Retrieved March 25, 2020, from Thailand International Cooperation Agency (TICA): http://tica.thaigov.net/main/en/business/6296/87783-Development-Diplomacy-and-SEP-for-SDGs-Partnership.html.

Srisod, T. (2011). Software Development : Information Usage Evaluation Model from Log File through Internet Network for Rajabhat Universities. Thailand: Bansomdejchaopraya Rajabhat University.

Wuthsien. (2006). World University Presidents Summit (WUPS). Sufficiency and Sustainability Commission on Higher Education, Ministry of Education, Thailand, 19–22 July 2006. Bangkok, Thailand.

Zimmermann, N. (2016, Octuber 11). Five of the world’s biggest environmental problems. Retrieved February 4, 2020, from DW Akademie: https://www.dw.com/en/five-of-the-worlds-biggest-environmental-problems/a-35915705.

Co , R. R. (2016, December 4). Top 17 Environmental Problems. Retrieved February 4, 2020, from RenewableResourcesCoalition: https://www.renewableresourcescoalition.org/top-environmental-problems/.

ORDPB. (2020, February 2). Environment. Retrieved February 2, 2020, from Office of the Royal Development Projects Board: http://www.rdpb.go.th/en/Projects/project-categories-c54/environment-v62.

ORDPB. (2020, February 2). Occupational Promotion. Retrieved February 2, 2020, from Office of the Royal Development Projects Board: http://www.rdpb.go.th/en/Projects/project-categories-c54/occupational-promotion-v63.

ORDPB. (2020, February 2). PUBLIC WELFARE. Retrieved February 2, 2020, from Office of the Royal Development Projects Board: http://www.rdpb.go.th/en/Projects/project-categories-c54/public-welfare-v245.

ORDPB. (2020, February 2). Public Health. Retrieved February 2, 2020, from Office of the Royal Development Projects Board: http://www.rdpb.go.th/en/Projects/project-categories-c54/public-health-v64

ORDPB. (2020, February 2). Transportation/ Communications. Retrieved February 2, 2020, from Office of the Royal Development Projects Board: http://www.rdpb.go.th/en/Projects/project-categories-c54/transportation-communications-v244.

Pear. (2017, October 5). images. Retrieved February 2, 2020, from urban creature: https://urbancreature.co/king-9-capability/.

Chan-o-cha, P. (2019, July 25). Policy Statement of the Council of Ministers. from Ministry of Foreign Affairs, Kingdom of Thailand. Retrieved from Royal thai government: https://www.thaigov.go.th/uploads/document/66/2019/07/pdf/Doc_20190725085640000000.pdf.

NATIONS, U. (2020, February 5). Transforming our world: the 2030 Agenda for Sustainable Development. Retrieved February 5, 2020, from Division for Sustainable Development Goals: https://sustainabledevelopment.un.org/post2015/transformingourworld.

Downloads

Published

2020-12-25

How to Cite

Wongkumchai, T., Na Ayuthaya, S. D. ., & Kiattisin, S. (2020). The Consistency of the Sufficiency Economy Philosophy (SEP) with Sustainable Development Goals (SDGs). Journal of Mobile Multimedia, 16(4), 413–448. https://doi.org/10.13052/jmm1550-4646.1641

Issue

2020: Vol 16 Iss 4

Section

Articles

Most read articles by the same author(s)