IDEAS home Printed from
   My bibliography  Save this paper

Relationships between energy technology patents and CO2 emissions in China: An empirical study


  • Zhaohua Wang
  • Zhongmin Yang
  • Yixiang Zhang


This paper explores dynamic relationships between energy technology patents and CO2 emissions in China during 1985-2009. Based on vector autoregression (VAR), cointegration and vector error correction model (VECM) are adopted to uncover relationships in both long-run and short-run; also dynamic interactions are identified to establish these relationships between variables through impulse response functions and variance decomposition methods. Results show that: (1) the increase of energy technology patents does not reduce CO2 emissions in both long-run and short-run; (2) in the long-run, the increase of energy technology patents helps to reduce CO2 emissions intensity; while it does not for the short term. The present empirical study clearly indicates that Chinese government should attach more importance to investigating and improving energy technology patent system and formulating related energy technology policies for CO2 emissions reduction.

Suggested Citation

  • Zhaohua Wang & Zhongmin Yang & Yixiang Zhang, 2012. "Relationships between energy technology patents and CO2 emissions in China: An empirical study," CEEP-BIT Working Papers 34, Center for Energy and Environmental Policy Research (CEEP), Beijing Institute of Technology.
  • Handle: RePEc:biw:wpaper:34

    Download full text from publisher

    File URL:
    Download Restriction: no

    References listed on IDEAS

    1. Garrone, Paola & Grilli, Luca, 2010. "Is there a relationship between public expenditures in energy R&D and carbon emissions per GDP? An empirical investigation," Energy Policy, Elsevier, vol. 38(10), pages 5600-5613, October.
    2. Fisher-Vanden, Karen & Sue Wing, Ian, 2008. "Accounting for quality: Issues with modeling the impact of R&D on economic growth and carbon emissions in developing economies," Energy Economics, Elsevier, vol. 30(6), pages 2771-2784, November.
    3. Margolis, Robert M. & Kammen, Daniel M., 1999. "Evidence of under-investment in energy R&D in the United States and the impact of Federal policy," Energy Policy, Elsevier, vol. 27(10), pages 575-584, October.
    4. Bernstein, Paul M. & Montgomery, W. David & Tuladhar, Sugandha D., 2006. "Potential for reducing carbon emissions from non-Annex B countries through changes in technology," Energy Economics, Elsevier, vol. 28(5-6), pages 742-762, November.
    Full references (including those not matched with items on IDEAS)


    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.

    Cited by:

    1. Li, Ke & Lin, Boqiang, 2016. "Impact of energy technology patents in China: Evidence from a panel cointegration and error correction model," Energy Policy, Elsevier, vol. 89(C), pages 214-223.
    2. Hao, Yu & Zhang, Tianli & Jing, Leijie & Xiao, Linqi, 2019. "Would the decoupling of electricity occur along with economic growth? Empirical evidence from the panel data analysis for 100 Chinese cities," Energy, Elsevier, vol. 180(C), pages 615-625.
    3. Zhang, Gupeng & Duan, Hongbo & Wang, Shouyang & Zhang, Qianlong, 2018. "Comparative technological advantages between China and developed areas in respect of energy production: Quantitative and qualitative measurements based on patents," Energy, Elsevier, vol. 162(C), pages 1223-1233.
    4. Milin Lu & Zhaohua Wang, 2017. "Rebound effects for residential electricity use in urban China: an aggregation analysis based E-I-O and scenario simulation," Annals of Operations Research, Springer, vol. 255(1), pages 525-546, August.
    5. Yang, Yuan & Cai, Wenjia & Wang, Can, 2014. "Industrial CO2 intensity, indigenous innovation and R&D spillovers in China’s provinces," Applied Energy, Elsevier, vol. 131(C), pages 117-127.
    6. Wong, Chan-Yuan & Fatimah Mohamad, Zeeda & Keng, Zi-Xiang & Ariff Azizan, Suzana, 2014. "Examining the patterns of innovation in low carbon energy science and technology: Publications and patents of Asian emerging economies," Energy Policy, Elsevier, vol. 73(C), pages 789-802.

    More about this item


    CO2 emissions; CO2 emission intensity; energy technology patents; GDP; VAR/VECM;

    JEL classification:

    • Q40 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - General
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming


    Access and download statistics


    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:biw:wpaper:34. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Zhi-Fu Mi). General contact details of provider: .

    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 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.

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

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.