IDEAS home Printed from https://ideas.repec.org/a/eee/ecofin/v69y2024ipbs1062940823001535.html
   My bibliography  Save this article

Energy, metals, market uncertainties, and ESG stocks: Analysing predictability and safe havens

Author

Listed:
  • Yang, Junhua
  • Agyei, Samuel Kwaku
  • Bossman, Ahmed
  • Gubareva, Mariya
  • Marfo-Yiadom, Edward

Abstract

To address ESG stock susceptibility to episodic shocks in financial markets, we use nonparametric quantile-based techniques applied to the 2014–2022 period. We (i) analyse the ability of traditional assets to predict ESG stocks returns, (ii) explore whether oil or gold serves as a safe haven for ESG stocks, and (iii) ascertain how ESG stocks respond to market sentiment, crypto-based uncertainty, and geopolitical risk (GPR). We find that gold, oil, market sentiment (tracked by the VIX), the implied volatility of crude oil (OVX) and GPR are significant predictors of ESG returns. None of gold or oil serves as a safe haven for ESG stocks, both acting just as diversifiers. In their turn, ESG could stocks hedge against the shocks from GPR and cryptocurrency-triggered market uncertainties in bearish states of the market. These findings are important for asset allocation and risk management, assisting investors in the already ongoing switch from ordinary to sustainable investments.

Suggested Citation

  • Yang, Junhua & Agyei, Samuel Kwaku & Bossman, Ahmed & Gubareva, Mariya & Marfo-Yiadom, Edward, 2024. "Energy, metals, market uncertainties, and ESG stocks: Analysing predictability and safe havens," The North American Journal of Economics and Finance, Elsevier, vol. 69(PB).
  • Handle: RePEc:eee:ecofin:v:69:y:2024:i:pb:s1062940823001535
    DOI: 10.1016/j.najef.2023.102030
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S1062940823001535
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.najef.2023.102030?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. Le, Lan-TN & Yarovaya, Larisa & Nasir, Muhammad Ali, 2021. "Did COVID-19 change spillover patterns between Fintech and other asset classes?," Research in International Business and Finance, Elsevier, vol. 58(C).
    2. Dirk G. Baur & Brian M. Lucey, 2010. "Is Gold a Hedge or a Safe Haven? An Analysis of Stocks, Bonds and Gold," The Financial Review, Eastern Finance Association, vol. 45(2), pages 217-229, May.
    3. Ahmed, Abdullahi D. & Huo, Rui, 2021. "Volatility transmissions across international oil market, commodity futures and stock markets: Empirical evidence from China," Energy Economics, Elsevier, vol. 93(C).
    4. Kamal, Javed Bin & Hassan, M. Kabir, 2022. "Asymmetric connectedness between cryptocurrency environment attention index and green assets," The Journal of Economic Asymmetries, Elsevier, vol. 25(C).
    5. Junior, Peterson Owusu & Tiwari, Aviral Kumar & Padhan, Hemachandra & Alagidede, Imhotep, 2020. "Analysis of EEMD-based quantile-in-quantile approach on spot- futures prices of energy and precious metals in India," Resources Policy, Elsevier, vol. 68(C).
    6. Shafi Madhkar Alsubaie & Khaled H. Mahmoud & Ahmed Bossman & Emmanuel Asafo-Adjei & Stefan Cristian Gherghina, 2022. "Vulnerability of Sustainable Islamic Stock Returns to Implied Market Volatilities: An Asymmetric Approach," Discrete Dynamics in Nature and Society, Hindawi, vol. 2022, pages 1-22, July.
    7. Samuel Kwaku Agyei & Yuxing Li, 2022. "Diversification Benefits between Stock Returns from Ghana and Jamaica: Insights from Time-Frequency and VMD-Based Asymmetric Quantile-on-Quantile Analysis," Mathematical Problems in Engineering, Hindawi, vol. 2022, pages 1-16, September.
    8. Samuel M. Hartzmark & Abigail B. Sussman, 2019. "Do Investors Value Sustainability? A Natural Experiment Examining Ranking and Fund Flows," Journal of Finance, American Finance Association, vol. 74(6), pages 2789-2837, December.
    9. Lei, Heng & Xue, Minggao & Liu, Huiling & Ye, Jing, 2023. "Precious metal as a safe haven for global ESG stocks: Portfolio implications for socially responsible investing," Resources Policy, Elsevier, vol. 80(C).
    10. Alexandre Garel & Arthur Petit-Romec, 2021. "Investor rewards to environmental responsibility: Evidence from the COVID-19 crisis," Post-Print hal-03204216, HAL.
    11. Arno Riedl & Paul Smeets, 2017. "Why Do Investors Hold Socially Responsible Mutual Funds?," Journal of Finance, American Finance Association, vol. 72(6), pages 2505-2550, December.
    12. Boubaker, Sabri & Liu, Zhenya & Zhan, Yaosong, 2022. "Customer relationships, corporate social responsibility, and stock price reaction: Lessons from China during health crisis times," Finance Research Letters, Elsevier, vol. 47(PB).
    13. Gubareva, Mariya & Bossman, Ahmed & Teplova, Tamara, 2023. "Stablecoins as the cornerstone in the linkage between the digital and conventional financial markets," The North American Journal of Economics and Finance, Elsevier, vol. 68(C).
    14. Garel, Alexandre & Petit-Romec, Arthur, 2021. "Investor rewards to environmental responsibility: Evidence from the COVID-19 crisis," Journal of Corporate Finance, Elsevier, vol. 68(C).
    15. Boubaker, Sabri & Goodell, John W. & Pandey, Dharen Kumar & Kumari, Vineeta, 2022. "Heterogeneous impacts of wars on global equity markets: Evidence from the invasion of Ukraine," Finance Research Letters, Elsevier, vol. 48(C).
    16. Naeem, Muhammad Abubakr & Hasan, Mudassar & Arif, Muhammad & Suleman, Muhammad Tahir & Kang, Sang Hoon, 2022. "Oil and gold as a hedge and safe-haven for metals and agricultural commodities with portfolio implications," Energy Economics, Elsevier, vol. 105(C).
    17. Ahmed Bossman & Samuel Kwaku Agyei & Peterson Owusu Junior & Ellen Animah Agyei & Patrick Kwashie Akorsu & Edward Marfo-Yiadom & George Amfo-Antiri & Mariya Gubareva, 2022. "Flights-to-and-from-Quality with Islamic and Conventional Bonds in the COVID-19 Pandemic Era: ICEEMDAN-Based Transfer Entropy," Complexity, Hindawi, vol. 2022, pages 1-25, January.
    18. Lucey, Brian M. & Vigne, Samuel A. & Yarovaya, Larisa & Wang, Yizhi, 2022. "The cryptocurrency uncertainty index," Finance Research Letters, Elsevier, vol. 45(C).
    19. Rui Albuquerque & Yrjo Koskinen & Shuai Yang & Chendi Zhang, 2020. "Resiliency of Environmental and Social Stocks: An Analysis of the Exogenous COVID-19 Market Crash," The Review of Corporate Finance Studies, Society for Financial Studies, vol. 9(3), pages 593-621.
    20. Będowska-Sójka, Barbara & Demir, Ender & Zaremba, Adam, 2022. "Hedging Geopolitical Risks with Different Asset Classes: A Focus on the Russian Invasion of Ukraine," Finance Research Letters, Elsevier, vol. 50(C).
    21. Ahmed Bossman & Paulo Jorge Silveira Ferreira, 2021. "Information Flow from COVID-19 Pandemic to Islamic and Conventional Equities: An ICEEMDAN-Induced Transfer Entropy Analysis," Complexity, Hindawi, vol. 2021, pages 1-20, December.
    22. Umar, Zaghum & Bossman, Ahmed & Choi, Sun-Yong & Teplova, Tamara, 2023. "The relationship between global risk aversion and returns from safe-haven assets," Finance Research Letters, Elsevier, vol. 51(C).
    23. Akhtaruzzaman, Md & Boubaker, Sabri & Umar, Zaghum, 2022. "COVID–19 media coverage and ESG leader indices," Finance Research Letters, Elsevier, vol. 45(C).
    24. Avramov, Doron & Cheng, Si & Lioui, Abraham & Tarelli, Andrea, 2022. "Sustainable investing with ESG rating uncertainty," Journal of Financial Economics, Elsevier, vol. 145(2), pages 642-664.
    25. Yizhi Wang & Brian Lucey & Samuel Alexandre Vigne & Larisa Yarovaya, 2022. "An index of cryptocurrency environmental attention (ICEA)," China Finance Review International, Emerald Group Publishing Limited, vol. 12(3), pages 378-414, January.
    26. Nonejad, Nima, 2022. "An interesting finding about the ability of geopolitical risk to forecast aggregate equity return volatility out-of-sample," Finance Research Letters, Elsevier, vol. 47(PB).
    27. Pástor, Ľuboš & Stambaugh, Robert F. & Taylor, Lucian A., 2022. "Dissecting green returns," Journal of Financial Economics, Elsevier, vol. 146(2), pages 403-424.
    28. Umar, Zaghum & Gubareva, Mariya & Tran, Dang Khoa & Teplova, Tamara, 2021. "Impact of the Covid-19 induced panic on the Environmental, Social and Governance leaders equity volatility: A time-frequency analysis," Research in International Business and Finance, Elsevier, vol. 58(C).
    29. Hashmi, Shabir Mohsin & Chang, Bisharat Hussain & Rong, Li, 2021. "Asymmetric effect of COVID-19 pandemic on E7 stock indices: Evidence from quantile-on-quantile regression approach," Research in International Business and Finance, Elsevier, vol. 58(C).
    30. Naeem, Muhammad Abubakr & Peng, Zhe & Bouri, Elie & Hussain Shahzad, Syed Jawad & Karim, Sitara, 2022. "Examining the asymmetries between equity and commodity ETFs during COVID-19," Resources Policy, Elsevier, vol. 79(C).
    31. Junttila, Juha & Pesonen, Juho & Raatikainen, Juhani, 2018. "Commodity market based hedging against stock market risk in times of financial crisis: The case of crude oil and gold," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 56(C), pages 255-280.
    32. Kempf, Alexander & Osthoff, Peer, 2007. "The effect of socially responsible investing on portfolio performance," CFR Working Papers 06-10, University of Cologne, Centre for Financial Research (CFR).
    33. Singh, Amanjot, 2020. "COVID-19 and safer investment bets," Finance Research Letters, Elsevier, vol. 36(C).
    34. Hasan, Md. Bokhtiar & Hassan, M. Kabir & Karim, Zulkefly Abdul & Rashid, Md. Mamunur, 2022. "Exploring the hedge and safe haven properties of cryptocurrency in policy uncertainty," Finance Research Letters, Elsevier, vol. 46(PA).
    35. Koenker, Roger W & Bassett, Gilbert, Jr, 1978. "Regression Quantiles," Econometrica, Econometric Society, vol. 46(1), pages 33-50, January.
    36. Akhtaruzzaman, Md & Boubaker, Sabri & Sensoy, Ahmet, 2021. "Financial contagion during COVID–19 crisis," Finance Research Letters, Elsevier, vol. 38(C).
    37. Kais Bouslah & Lawrence Kryzanowski & Bouchra M’Zali, 2018. "Social Performance and Firm Risk: Impact of the Financial Crisis," Journal of Business Ethics, Springer, vol. 149(3), pages 643-669, May.
    38. Bossman, Ahmed & Gubareva, Mariya & Teplova, Tamara, 2023. "Asymmetric effects of geopolitical risk on major currencies: Russia-Ukraine tensions," Finance Research Letters, Elsevier, vol. 51(C).
    39. Ke Chen & Meng Wang, 2019. "Is gold a hedge and safe haven for stock market?," Applied Economics Letters, Taylor & Francis Journals, vol. 26(13), pages 1080-1086, July.
    40. Bossman, Ahmed & Gubareva, Mariya & Teplova, Tamara, 2023. "EU sectoral stocks amid geopolitical risk, market sentiment, and crude oil implied volatility: An asymmetric analysis of the Russia-Ukraine tensions," Resources Policy, Elsevier, vol. 82(C).
    41. Bauer, Rob & Koedijk, Kees & Otten, Roger, 2005. "International evidence on ethical mutual fund performance and investment style," Journal of Banking & Finance, Elsevier, vol. 29(7), pages 1751-1767, July.
    42. Zaghum Umar & Mariya Gubareva, 2021. "The relationship between the Covid-19 media coverage and the Environmental, Social and Governance leaders equity volatility: a time-frequency wavelet analysis," Applied Economics, Taylor & Francis Journals, vol. 53(27), pages 3193-3206, June.
    43. Ciner, Cetin & Gurdgiev, Constantin & Lucey, Brian M., 2013. "Hedges and safe havens: An examination of stocks, bonds, gold, oil and exchange rates," International Review of Financial Analysis, Elsevier, vol. 29(C), pages 202-211.
    44. Broadstock, David C. & Chan, Kalok & Cheng, Louis T.W. & Wang, Xiaowei, 2021. "The role of ESG performance during times of financial crisis: Evidence from COVID-19 in China," Finance Research Letters, Elsevier, vol. 38(C).
    45. Henk Berkman & Michelle Li & Helen Lu, 2021. "Trust and the value of CSR during the global financial crisis," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 61(3), pages 4955-4965, September.
    46. Karl V. Lins & Henri Servaes & Ane Tamayo, 2017. "Social Capital, Trust, and Firm Performance: The Value of Corporate Social Responsibility during the Financial Crisis," Journal of Finance, American Finance Association, vol. 72(4), pages 1785-1824, August.
    47. Das, Debojyoti & Kannadhasan, M. & Bhattacharyya, Malay, 2019. "Do the emerging stock markets react to international economic policy uncertainty, geopolitical risk and financial stress alike?," The North American Journal of Economics and Finance, Elsevier, vol. 48(C), pages 1-19.
    48. Hassan, M. Kabir & Hasan, Md. Bokhtiar & Rashid, Md. Mamunur, 2021. "Using precious metals to hedge cryptocurrency policy and price uncertainty," Economics Letters, Elsevier, vol. 206(C).
    49. Naeem, Muhammad Abubakr & Hasan, Mudassar & Arif, Muhammad & Balli, Faruk & Shahzad, Syed Jawad Hussain, 2020. "Time and frequency domain quantile coherence of emerging stock markets with gold and oil prices," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 553(C).
    50. Alexander Kempf & Peer Osthoff, 2007. "The Effect of Socially Responsible Investing on Portfolio Performance," European Financial Management, European Financial Management Association, vol. 13(5), pages 908-922, November.
    51. Jeong, Kiho & Härdle, Wolfgang K. & Song, Song, 2012. "A Consistent Nonparametric Test For Causality In Quantile," Econometric Theory, Cambridge University Press, vol. 28(4), pages 861-887, August.
    52. Bossman, Ahmed & Umar, Zaghum & Teplova, Tamara, 2022. "Modelling the asymmetric effect of COVID-19 on REIT returns: A quantile-on-quantile regression analysis," The Journal of Economic Asymmetries, Elsevier, vol. 26(C).
    53. Samah Hazgui & Saber Sebai & Walid Mensi, 2021. "Dynamic frequency relationships between bitcoin, oil, gold and economic policy uncertainty index," Studies in Economics and Finance, Emerald Group Publishing Limited, vol. 39(3), pages 419-443, October.
    54. Cornett, Marcia Millon & Erhemjamts, Otgontsetseg & Tehranian, Hassan, 2016. "Greed or good deeds: An examination of the relation between corporate social responsibility and the financial performance of U.S. commercial banks around the financial crisis," Journal of Banking & Finance, Elsevier, vol. 70(C), pages 137-159.
    55. Choi, Sun-Yong, 2022. "Evidence from a multiple and partial wavelet analysis on the impact of geopolitical concerns on stock markets in North-East Asian countries," Finance Research Letters, Elsevier, vol. 46(PB).
    56. Elizabeth Demers & Jurian Hendrikse & Philip Joos & Baruch Lev, 2021. "ESG did not immunize stocks during the COVID‐19 crisis, but investments in intangible assets did," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 48(3-4), pages 433-462, March.
    57. Umar, Zaghum & Bossman, Ahmed & Choi, Sun-Yong & Teplova, Tamara, 2022. "Does geopolitical risk matter for global asset returns? Evidence from quantile-on-quantile regression," Finance Research Letters, Elsevier, vol. 48(C).
    58. Dutta, Anupam & Das, Debojyoti & Jana, R.K. & Vo, Xuan Vinh, 2020. "COVID-19 and oil market crash: Revisiting the safe haven property of gold and Bitcoin," Resources Policy, Elsevier, vol. 69(C).
    59. Mensi, Walid & Nekhili, Ramzi & Vo, Xuan Vinh & Kang, Sang Hoon, 2021. "Oil and precious metals: Volatility transmission, hedging, and safe haven analysis from the Asian crisis to the COVID-19 crisis," Economic Analysis and Policy, Elsevier, vol. 71(C), pages 73-96.
    60. Hassan, M. Kabir & Hasan, Md. Bokhtiar & Halim, Zairihan Abdul & Maroney, Neal & Rashid, Md. Mamunur, 2022. "Exploring the dynamic spillover of cryptocurrency environmental attention across the commodities, green bonds, and environment-related stocks," The North American Journal of Economics and Finance, Elsevier, vol. 61(C).
    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. Lei, Heng & Xue, Minggao & Liu, Huiling & Ye, Jing, 2023. "Precious metal as a safe haven for global ESG stocks: Portfolio implications for socially responsible investing," Resources Policy, Elsevier, vol. 80(C).
    2. Bossman, Ahmed & Gubareva, Mariya & Teplova, Tamara, 2023. "Asymmetric effects of market uncertainties on agricultural commodities," Energy Economics, Elsevier, vol. 127(PB).
    3. Bossman, Ahmed & Gubareva, Mariya & Teplova, Tamara, 2023. "EU sectoral stocks amid geopolitical risk, market sentiment, and crude oil implied volatility: An asymmetric analysis of the Russia-Ukraine tensions," Resources Policy, Elsevier, vol. 82(C).
    4. Agyei, Samuel Kwaku & Umar, Zaghum & Bossman, Ahmed & Teplova, Tamara, 2023. "Dynamic connectedness between global commodity sectors, news sentiment, and sub-Saharan African equities," Emerging Markets Review, Elsevier, vol. 56(C).
    5. Xu, Nana & Chen, Jiaqi & Zhou, Fangzhao & Dong, Qing & He, Zhifang, 2023. "Corporate ESG and resilience of stock prices in the context of the COVID-19 pandemic in China," Pacific-Basin Finance Journal, Elsevier, vol. 79(C).
    6. Umar, Zaghum & Bossman, Ahmed, 2023. "Quantile connectedness between oil price shocks and exchange rates," Resources Policy, Elsevier, vol. 83(C).
    7. Inzamam Ul Haq, 2023. "Time‐frequency comovement among green financial assets and cryptocurrency uncertainties," Economic Notes, Banca Monte dei Paschi di Siena SpA, vol. 52(1), February.
    8. Jing Lu & Kathleen Rodenburg & Lianne Foti & Ann Pegoraro, 2022. "Are firms with better sustainability performance more resilient during crises?," Business Strategy and the Environment, Wiley Blackwell, vol. 31(7), pages 3354-3370, November.
    9. Feng, Hao & Gao, Da & Duan, Kun & Urquhart, Andrew, 2023. "Does Bitcoin affect decomposed oil shocks differently? Evidence from a quantile-based framework," International Review of Financial Analysis, Elsevier, vol. 89(C).
    10. Rim El Khoury & Nohade Nasrallah & Khaled Hussainey, 2022. "Exploring the performance of responsible companies in G20 during the COVID-19 outbreak," Post-Print hal-03761427, HAL.
    11. Imen Khanchel & Naima Lassoued & Rym Gargoury, 2023. "CSR and firm value: is CSR valuable during the COVID 19 crisis in the French market?," Journal of Management & Governance, Springer;Accademia Italiana di Economia Aziendale (AIDEA), vol. 27(2), pages 575-601, June.
    12. Costanza Torricelli & Beatrice Bertelli, 2022. "ESG screening strategies and portfolio performance: how do they fare in periods of financial distress?," Centro Studi di Banca e Finanza (CEFIN) (Center for Studies in Banking and Finance) 0087, Universita di Modena e Reggio Emilia, Dipartimento di Economia "Marco Biagi".
    13. Yi, Yuyang & Zhang, Zongyi & Xiang, Cheng, 2022. "The value of CSR during the COVID-19 crisis: Evidence from Chinese firms," Pacific-Basin Finance Journal, Elsevier, vol. 74(C).
    14. Bossman, Ahmed & Umar, Zaghum & Agyei, Samuel Kwaku & Junior, Peterson Owusu, 2022. "A new ICEEMDAN-based transfer entropy quantifying information flow between real estate and policy uncertainty," Research in Economics, Elsevier, vol. 76(3), pages 189-205.
    15. Andrea Jacob & Martin Nerlinger, 2021. "Investors’ Delight? Climate Risk in Stock Valuation during COVID-19 and Beyond," Sustainability, MDPI, vol. 13(21), pages 1-17, November.
    16. Bongiovanni, Alessio & Fiandrino, Simona, 2024. "Does firm environmental performance mitigate the market reaction to COVID-19 uncertainty?," Research in International Business and Finance, Elsevier, vol. 68(C).
    17. Zhang, Ning & Zhang, Yue & Zong, Zhe, 2023. "Fund ESG performance and downside risk: Evidence from China," International Review of Financial Analysis, Elsevier, vol. 86(C).
    18. Hanif, Waqas & Andraz, Jorge Miguel & Gubareva, Mariya & Teplova, Tamara, 2024. "Are REITS hedge or safe haven against oil price fall?," International Review of Economics & Finance, Elsevier, vol. 89(PA), pages 1-16.
    19. Fang, Fei & Parida, Sitikantha, 2022. "Sustainable mutual fund performance and flow in the recent years through the COVID-19 pandemic," International Review of Financial Analysis, Elsevier, vol. 84(C).
    20. Umar, Zaghum & Bossman, Ahmed & Choi, Sun-Yong & Teplova, Tamara, 2023. "The relationship between global risk aversion and returns from safe-haven assets," Finance Research Letters, Elsevier, vol. 51(C).

    More about this item

    Keywords

    ESG stocks; Geopolitical risk; Cryptocurrency environmental attention; Predictability; Safe haven; Hedge;
    All these keywords.

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets
    • Q01 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - General - - - Sustainable Development
    • Q43 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Energy and the Macroeconomy

    Statistics

    Access and download statistics

    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:ecofin:v:69:y:2024:i:pb:s1062940823001535. 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.elsevier.com/locate/inca/620163 .

    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.