IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v200y2022icp546-557.html
   My bibliography  Save this article

How does information and communication technology affect renewable energy technology innovation? International evidence

Author

Listed:
  • Lee, Chien-Chiang
  • He, Zhi-Wen
  • Xiao, Fu

Abstract

Renewable energy technology innovation (RETI) has become a key factor in mitigating climate change and promoting sustainable development of the world economy, but there is no literature on the effect of information and communication technology (ICT) on RETI and its impact mechanism. This paper measures RETI using panel data for 70 countries from 2005 to 2019 based on the combination of diffusion and depreciation effects of technological innovation and systematically examines the direct and mediating mechanisms of ICT's effect on RETI. The results show that ICT significantly contributes to RETI and even holds after addressing endogeneity, replacing the explanatory or explanatory variables, excluding extreme values, and excluding the effects of the financial crisis. The results of the transmission mechanism analysis indicate that ICT affects RETI through human capital accumulation, financial development, and information disclosure, meaning that human capital, financial development, and information disclosure are important mediating transmission mechanisms. The results of heterogeneity analysis note significant economic organizational heterogeneity and innovation environment heterogeneity of ICT to RETI. Specifically, in IEA and OECD member nations as well as in the high renewable energy consumption and high R&D investment groups, the contribution effect of ICT on RETI is more significant.

Suggested Citation

  • Lee, Chien-Chiang & He, Zhi-Wen & Xiao, Fu, 2022. "How does information and communication technology affect renewable energy technology innovation? International evidence," Renewable Energy, Elsevier, vol. 200(C), pages 546-557.
  • Handle: RePEc:eee:renene:v:200:y:2022:i:c:p:546-557
    DOI: 10.1016/j.renene.2022.10.015
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148122015051
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.renene.2022.10.015?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Sakiru Adebola Solarin & Muhammad Shahbaz & Habib Nawaz Khan & Radzuan Bin Razali, 2021. "ICT, Financial Development, Economic Growth and Electricity Consumption: New Evidence from Malaysia," Global Business Review, International Management Institute, vol. 22(4), pages 941-962, August.
    2. Nesta, Lionel & Vona, Francesco & Nicolli, Francesco, 2014. "Environmental policies, competition and innovation in renewable energy," Journal of Environmental Economics and Management, Elsevier, vol. 67(3), pages 396-411.
    3. Lin, Boqiang & Chen, Yufang, 2019. "Does electricity price matter for innovation in renewable energy technologies in China?," Energy Economics, Elsevier, vol. 78(C), pages 259-266.
    4. Narayan, Seema & Doytch, Nadia, 2017. "An investigation of renewable and non-renewable energy consumption and economic growth nexus using industrial and residential energy consumption," Energy Economics, Elsevier, vol. 68(C), pages 160-176.
    5. Awijen, Haithem & Belaïd, Fateh & Zaied, Younes Ben & Hussain, Nazim & Lahouel, Béchir Ben, 2022. "Renewable energy deployment in the MENA region: Does innovation matter?," Technological Forecasting and Social Change, Elsevier, vol. 179(C).
    6. Liu, Min & Lee, Chien-Chiang, 2021. "Capturing the dynamics of the China crude oil futures: Markov switching, co-movement, and volatility forecasting," Energy Economics, Elsevier, vol. 103(C).
    7. Wang, En-Ze & Lee, Chien-Chiang, 2022. "The impact of clean energy consumption on economic growth in China: Is environmental regulation a curse or a blessing?," International Review of Economics & Finance, Elsevier, vol. 77(C), pages 39-58.
    8. Owusu-Agyei, Samuel & Okafor, Godwin & Chijoke-Mgbame, Aruoriwo Marian & Ohalehi, Paschal & Hasan, Fakhrul, 2020. "Internet adoption and financial development in sub-Saharan Africa," Technological Forecasting and Social Change, Elsevier, vol. 161(C).
    9. Paunov, Caroline & Rollo, Valentina, 2016. "Has the Internet Fostered Inclusive Innovation in the Developing World?," World Development, Elsevier, vol. 78(C), pages 587-609.
    10. Nick Johnstone & Ivan Haščič & David Popp, 2010. "Renewable Energy Policies and Technological Innovation: Evidence Based on Patent Counts," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 45(1), pages 133-155, January.
    11. Wolde-Rufael, Yemane, 2010. "Bounds test approach to cointegration and causality between nuclear energy consumption and economic growth in India," Energy Policy, Elsevier, vol. 38(1), pages 52-58, January.
    12. John C. Driscoll & Aart C. Kraay, 1998. "Consistent Covariance Matrix Estimation With Spatially Dependent Panel Data," The Review of Economics and Statistics, MIT Press, vol. 80(4), pages 549-560, November.
    13. Zhong, Mei-Rui & Cao, Meng-Yuan & Zou, Han, 2022. "The carbon reduction effect of ICT: A perspective of factor substitution," Technological Forecasting and Social Change, Elsevier, vol. 181(C).
    14. Ren, Siyu & Hao, Yu & Xu, Lu & Wu, Haitao & Ba, Ning, 2021. "Digitalization and energy: How does internet development affect China's energy consumption?," Energy Economics, Elsevier, vol. 98(C).
    15. Liu, Wenfeng & Zhang, Xingping & Feng, Sida, 2019. "Does renewable energy policy work? Evidence from a panel data analysis," Renewable Energy, Elsevier, vol. 135(C), pages 635-642.
    16. Keung-Oui Kim & Ahmed Bounfour & Alberto Nonnis & Altay Özaygen, 2021. "Measuring ICT externalities and their contribution to productivity: a bilateral trade based approach," Post-Print hal-03825279, HAL.
    17. Hille, Erik & Althammer, Wilhelm & Diederich, Henning, 2020. "Environmental regulation and innovation in renewable energy technologies: Does the policy instrument matter?," Technological Forecasting and Social Change, Elsevier, vol. 153(C).
    18. Farhad Taghizadeh-Hesary & Naoyuki Yoshino, 2020. "Sustainable Solutions for Green Financing and Investment in Renewable Energy Projects," Energies, MDPI, vol. 13(4), pages 1-18, February.
    19. Chen, Wenhui & Lei, Yalin, 2018. "The impacts of renewable energy and technological innovation on environment-energy-growth nexus: New evidence from a panel quantile regression," Renewable Energy, Elsevier, vol. 123(C), pages 1-14.
    20. Elena Verdolini & Marzio Galeotti, 2009. "At Home and Abroad: An Empirical Analysis of Innovation and Diffusion in Energy-Efficient Technologies," Working Papers 2009.123, Fondazione Eni Enrico Mattei.
    21. Daniel Hoechle, 2007. "Robust standard errors for panel regressions with cross-sectional dependence," Stata Journal, StataCorp LP, vol. 7(3), pages 281-312, September.
    22. Yan, Zheming & Zou, Baoling & Du, Kerui & Li, Ke, 2020. "Do renewable energy technology innovations promote China's green productivity growth? Fresh evidence from partially linear functional-coefficient models," Energy Economics, Elsevier, vol. 90(C).
    23. Andrew B. Bernard & Andreas Moxnes & Yukiko U. Saito, 2019. "Production Networks, Geography, and Firm Performance," Journal of Political Economy, University of Chicago Press, vol. 127(2), pages 639-688.
    24. Lee, Chi-Chuan & Lee, Chien-Chiang, 2022. "How does green finance affect green total factor productivity? Evidence from China," Energy Economics, Elsevier, vol. 107(C).
    25. Yukun Wang & Chunling Li & Muhammad Asif Khan & Nian Li & Runsen Yuan, 2021. "Firm information disclosure environment and R&D investment: Evidence from Internet penetration," PLOS ONE, Public Library of Science, vol. 16(3), pages 1-20, March.
    26. Khan, Anwar & Chenggang, Yang & Hussain, Jamal & Kui, Zhou, 2021. "Impact of technological innovation, financial development and foreign direct investment on renewable energy, non-renewable energy and the environment in belt & Road Initiative countries," Renewable Energy, Elsevier, vol. 171(C), pages 479-491.
    27. Batjargal, Bat, 2007. "Internet entrepreneurship: Social capital, human capital, and performance of Internet ventures in China," Research Policy, Elsevier, vol. 36(5), pages 605-618, June.
    28. Tu, Qiang & Mo, Jianlei & Liu, Zhuoran & Gong, Chunxu & Fan, Ying, 2021. "Using green finance to counteract the adverse effects of COVID-19 pandemic on renewable energy investment-The case of offshore wind power in China," Energy Policy, Elsevier, vol. 158(C).
    29. Hazwan Haini, 2021. "Examining the impact of ICT, human capital and carbon emissions: Evidence from the ASEAN economies," International Economics, CEPII research center, issue 166, pages 116-125.
    30. Alvarez-Herranz, Agustin & Balsalobre-Lorente, Daniel & Shahbaz, Muhammad & Cantos, José María, 2017. "Energy innovation and renewable energy consumption in the correction of air pollution levels," Energy Policy, Elsevier, vol. 105(C), pages 386-397.
    31. Nicolli, Francesco & Vona, Francesco, 2016. "Heterogeneous policies, heterogeneous technologies: The case of renewable energy," Energy Economics, Elsevier, vol. 56(C), pages 190-204.
    32. Schleich, Joachim & Walz, Rainer & Ragwitz, Mario, 2017. "Effects of policies on patenting in wind-power technologies," Energy Policy, Elsevier, vol. 108(C), pages 684-695.
    33. Wang, Wei & Xiao, Weiwei & Bai, Caiquan, 2022. "Can renewable energy technology innovation alleviate energy poverty? Perspective from the marketization level," Technology in Society, Elsevier, vol. 68(C).
    34. Baumann, Julian & Kritikos, Alexander S., 2016. "The link between R&D, innovation and productivity: Are micro firms different?," Research Policy, Elsevier, vol. 45(6), pages 1263-1274.
    35. Lv, Chengchao & Bian, Baocheng & Lee, Chien-Chiang & He, Zhiwen, 2021. "Regional gap and the trend of green finance development in China," Energy Economics, Elsevier, vol. 102(C).
    36. Tang, Chang & Xu, Yuanyuan & Hao, Yu & Wu, Haitao & Xue, Yan, 2021. "What is the role of telecommunications infrastructure construction in green technology innovation? A firm-level analysis for China," Energy Economics, Elsevier, vol. 103(C).
    37. Muhammad Shahbaz & Alaa Soliman & Subhan Ullah (ed.), 2021. "Economic Growth and Financial Development," Springer Books, Springer, number 978-3-030-79003-5, November.
    38. Danish, & Ulucak, Recep, 2021. "A revisit to the relationship between financial development and energy consumption: Is globalization paramount?," Energy, Elsevier, vol. 227(C).
    39. Lucas, Robert Jr., 1988. "On the mechanics of economic development," Journal of Monetary Economics, Elsevier, vol. 22(1), pages 3-42, July.
    40. Kim, Keungoui & Bounfour, Ahmed & Nonnis, Alberto & Özaygen, Altay, 2021. "Measuring ICT externalities and their contribution to productivity: A bilateral trade based approach," Telecommunications Policy, Elsevier, vol. 45(2).
    41. Mazzucato, Mariana & Semieniuk, Gregor, 2018. "Financing renewable energy: Who is financing what and why it matters," Technological Forecasting and Social Change, Elsevier, vol. 127(C), pages 8-22.
    42. Zhang, Mingming & Zhang, Shichang & Lee, Chien-Chiang & Zhou, Dequn, 2021. "Effects of trade openness on renewable energy consumption in OECD countries: New insights from panel smooth transition regression modelling," Energy Economics, Elsevier, vol. 104(C).
    43. Nesta, Lionel & Vona, Francesco & Nicolli, Francesco, 2014. "Environmental policies, competition and innovation in renewable energy," Journal of Environmental Economics and Management, Elsevier, vol. 67(3), pages 396-411.
    44. Noailly, Joëlle & Smeets, Roger, 2015. "Directing technical change from fossil-fuel to renewable energy innovation: An application using firm-level patent data," Journal of Environmental Economics and Management, Elsevier, vol. 72(C), pages 15-37.
    45. Zhou, Xiaoyong & Zhou, Dequn & Wang, Qunwei, 2018. "How does information and communication technology affect China's energy intensity? A three-tier structural decomposition analysis," Energy, Elsevier, vol. 151(C), pages 748-759.
    46. Linh Pham, 2019. "Does financial development matter for innovation in renewable energy?," Applied Economics Letters, Taylor & Francis Journals, vol. 26(21), pages 1756-1761, December.
    47. Li, Songran & Shao, Qinglong, 2021. "Exploring the determinants of renewable energy innovation considering the institutional factors: A negative binomial analysis," Technology in Society, Elsevier, vol. 67(C).
    48. Yu, Shiwei & Liu, Jie & Hu, Xing & Tian, Peng, 2022. "Does development of renewable energy reduce energy intensity? Evidence from 82 countries," Technological Forecasting and Social Change, Elsevier, vol. 174(C).
    49. Ozili, Peterson K, 2021. "Digital finance, green finance and social finance: is there a link?," MPRA Paper 110151, University Library of Munich, Germany.
    50. Bastida, Leire & Cohen, Jed J. & Kollmann, Andrea & Moya, Ana & Reichl, Johannes, 2019. "Exploring the role of ICT on household behavioural energy efficiency to mitigate global warming," Renewable and Sustainable Energy Reviews, Elsevier, vol. 103(C), pages 455-462.
    51. Xu, Qiong & Zhong, Meirui & Li, Xin, 2022. "How does digitalization affect energy? International evidence," Energy Economics, Elsevier, vol. 107(C).
    52. Hollenbeck, Brett, 2018. "Online Reputation Mechanisms and the Decreasing Value of Chain Affliation," MPRA Paper 91573, University Library of Munich, Germany.
    53. Haldar, Anasuya & Sethi, Narayan, 2022. "Environmental effects of Information and Communication Technology - Exploring the roles of renewable energy, innovation, trade and financial development," Renewable and Sustainable Energy Reviews, Elsevier, vol. 153(C).
    54. Nina Czernich & Oliver Falck & Tobias Kretschmer & Ludger Woessmann, 2011. "Broadband Infrastructure and Economic Growth," Economic Journal, Royal Economic Society, vol. 121(552), pages 505-532, May.
    55. Steffen, Bjarne, 2018. "The importance of project finance for renewable energy projects," Energy Economics, Elsevier, vol. 69(C), pages 280-294.
    56. Xiaojian Xiang & Chuanjiang Liu & Mian Yang & Xiaomeng Zhao, 2020. "Confession or justification: The effects of environmental disclosure on corporate green innovation in China," Corporate Social Responsibility and Environmental Management, John Wiley & Sons, vol. 27(6), pages 2735-2750, November.
    57. Lee, Chi-Chuan & Li, Xinrui & Yu, Chin-Hsien & Zhao, Jinsong, 2022. "The contribution of climate finance toward environmental sustainability: New global evidence," Energy Economics, Elsevier, vol. 111(C).
    58. Wu, Yizhong & Lee, Chien-Chiang & Lee, Chi-Chuan & Peng, Diyun, 2022. "Geographic proximity and corporate investment efficiency: Evidence from high-speed rail construction in China," Journal of Banking & Finance, Elsevier, vol. 140(C).
    59. Zheng, Shilin & Duan, Yuwei & Ward, Michael R., 2019. "The effect of broadband internet on divorce in China," Technological Forecasting and Social Change, Elsevier, vol. 139(C), pages 99-114.
    60. Kais Saidi & Hassen Toumi & Saida Zaidi, 2017. "Impact of Information Communication Technology and Economic Growth on the Electricity Consumption: Empirical Evidence from 67 Countries," Journal of the Knowledge Economy, Springer;Portland International Center for Management of Engineering and Technology (PICMET), vol. 8(3), pages 789-803, September.
    61. Lee, Chien-Chiang & Hussain, Jafar & Chen, Yongxiu, 2022. "The optimal behavior of renewable energy resources and government's energy consumption subsidy design from the perspective of green technology implementation," Renewable Energy, Elsevier, vol. 195(C), pages 670-680.
    62. David Popp, 2002. "Induced Innovation and Energy Prices," American Economic Review, American Economic Association, vol. 92(1), pages 160-180, March.
    63. Lee, Chien-Chiang & Yuan, Zihao & Wang, Qiaoru, 2022. "How does information and communication technology affect energy security? International evidence," Energy Economics, Elsevier, vol. 109(C).
    64. Biresselioglu, Mehmet Efe & Kilinc, Dilara & Onater-Isberk, Esra & Yelkenci, Tezer, 2016. "Estimating the political, economic and environmental factors’ impact on the installed wind capacity development: A system GMM approach," Renewable Energy, Elsevier, vol. 96(PA), pages 636-644.
    65. Verdolini, Elena & Galeotti, Marzio, 2011. "At home and abroad: An empirical analysis of innovation and diffusion in energy technologies," Journal of Environmental Economics and Management, Elsevier, vol. 61(2), pages 119-134, March.
    66. Wen, Huwei & Zhong, Qiming & Lee, Chien-Chiang, 2022. "Digitalization, competition strategy and corporate innovation: Evidence from Chinese manufacturing listed companies," International Review of Financial Analysis, Elsevier, vol. 82(C).
    67. Popp, David & Hascic, Ivan & Medhi, Neelakshi, 2011. "Technology and the diffusion of renewable energy," Energy Economics, Elsevier, vol. 33(4), pages 648-662, July.
    68. Lee, Chien-Chiang & Xing, Wenwu & Lee, Chi-Chuan, 2022. "The impact of energy security on income inequality: The key role of economic development," Energy, Elsevier, vol. 248(C).
    69. Sharma, Gagan Deep & Verma, Mahesh & Shahbaz, Muhammad & Gupta, Mansi & Chopra, Ritika, 2022. "Transitioning green finance from theory to practice for renewable energy development," Renewable Energy, Elsevier, vol. 195(C), pages 554-565.
    70. Lange, Steffen & Pohl, Johanna & Santarius, Tilman, 2020. "Digitalization and energy consumption. Does ICT reduce energy demand?," Ecological Economics, Elsevier, vol. 176(C).
    71. Chen, Yang & Cheng, Liang & Lee, Chien-Chiang, 2022. "How does the use of industrial robots affect the ecological footprint? International evidence," Ecological Economics, Elsevier, vol. 198(C).
    72. Collard, Fabrice & Feve, Patrick & Portier, Franck, 2005. "Electricity consumption and ICT in the French service sector," Energy Economics, Elsevier, vol. 27(3), pages 541-550, May.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Hille, Erik & Althammer, Wilhelm & Diederich, Henning, 2020. "Environmental regulation and innovation in renewable energy technologies: Does the policy instrument matter?," Technological Forecasting and Social Change, Elsevier, vol. 153(C).
    2. Xu, Qiong & Zhong, Meirui & Li, Xin, 2022. "How does digitalization affect energy? International evidence," Energy Economics, Elsevier, vol. 107(C).
    3. Grafström, Jonas & Poudineh, Rahmat, 2023. "No evidence of counteracting policy effects on European solar power invention and diffusion," Energy Policy, Elsevier, vol. 172(C).
    4. Zhao, Ge & Zhou, P. & Wen, Wen, 2021. "Feed-in tariffs, knowledge stocks and renewable energy technology innovation: The role of local government intervention," Energy Policy, Elsevier, vol. 156(C).
    5. Kristoffer Palage & Robert Lundmark & Patrik Söderholm, 2019. "The innovation effects of renewable energy policies and their interaction: the case of solar photovoltaics," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 21(2), pages 217-254, April.
    6. He, Zhengxia & Cao, Changshuai & Kuai, Leyi & Zhou, Yanqing & Wang, Jianming, 2022. "Impact of policies on wind power innovation at different income levels: Regional differences in China based on dynamic panel estimation," Technology in Society, Elsevier, vol. 71(C).
    7. Zheng, Mingbo & Feng, Gen-Fu & Jang, Chyi-Lu & Chang, Chun-Ping, 2021. "Terrorism and green innovation in renewable energy," Energy Economics, Elsevier, vol. 104(C).
    8. Wen, Huwei & Liang, Weitao & Lee, Chien-Chiang, 2022. "Urban broadband infrastructure and green total-factor energy efficiency in China," Utilities Policy, Elsevier, vol. 79(C).
    9. Herman, Kyle S. & Xiang, Jun, 2019. "Induced innovation in clean energy technologies from foreign environmental policy stringency?," Technological Forecasting and Social Change, Elsevier, vol. 147(C), pages 198-207.
    10. Cheng, Yuanyuan & Yao, Xin, 2021. "Carbon intensity reduction assessment of renewable energy technology innovation in China: A panel data model with cross-section dependence and slope heterogeneity," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    11. Grafström, Jonas & Poudineh, Rahmat, 2023. "Invention and Diffusion in the Solar Power Sector," Ratio Working Papers 364, The Ratio Institute.
    12. Lionel Nesta & Elena Verdolini & Francesco Vona, 2018. "Threshold Policy Effects and Directed Technical Change in Energy Innovation," Documents de Travail de l'OFCE 2018-05, Observatoire Francais des Conjonctures Economiques (OFCE).
    13. Verdolini, Elena & Vona, Francesco & Popp, David, 2018. "Bridging the gap: Do fast-reacting fossil technologies facilitate renewable energy diffusion?," Energy Policy, Elsevier, vol. 116(C), pages 242-256.
    14. Chen, Yang & Cheng, Liang & Lee, Chien-Chiang, 2022. "How does the use of industrial robots affect the ecological footprint? International evidence," Ecological Economics, Elsevier, vol. 198(C).
    15. Palage, Kristoffer & Lundmark, Robert & Söderholm, Patrik, 2019. "The impact of pilot and demonstration plants on innovation: The case of advanced biofuel patenting in the European Union," International Journal of Production Economics, Elsevier, vol. 210(C), pages 42-55.
    16. David Popp, 2015. "Using Scientific Publications to Evaluate Government R&D Spending: The Case of Energy," CESifo Working Paper Series 5442, CESifo.
    17. Li, Kai & Yan, Yaxue & Zhang, Xiaoling, 2021. "Carbon-abatement policies, investment preferences, and directed technological change: Evidence from China," Technological Forecasting and Social Change, Elsevier, vol. 172(C).
    18. Lionel Nesta & Elena Verdolini & Francesco Vona, 2018. "Threshold Policy Effects and Directed Technical Change in Energy Innovation," GREDEG Working Papers 2018-01, Groupe de REcherche en Droit, Economie, Gestion (GREDEG CNRS), University of Nice Sophia Antipolis.
    19. Wen, Huwei & Wen, Changyong & Lee, Chien-Chiang, 2022. "Impact of digitalization and environmental regulation on total factor productivity," Information Economics and Policy, Elsevier, vol. 61(C).
    20. Feng, Gen-Fu & Zheng, Mingbo, 2022. "Economic policy uncertainty and renewable energy innovation: International evidence," Innovation and Green Development, Elsevier, vol. 1(2).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:200:y:2022:i:c:p:546-557. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.