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Is Monopolization Inevitable in Proof-of-Work Blockchains? Insights from Miner Scale Analysis

Author

Listed:
  • Aixing Li

    (University of Chongqing Jiaotong
    University of Chongqing Jiaotong)

  • Ke Gong

    (University of Chongqing Jiaotong)

  • Jiashun Li

    (University of Chongqing Jiaotong)

  • Li Zhang

    (Big Data and Optimization Research Institute, Chongqing Polytechnic University of Electronic Technology)

  • Xueting Luo

    (Qiqihar University)

Abstract

Blockchains use the Proof-of-Work (PoW) consensus mechanism to ensure security. However, if a few large miners increasingly control most of the computing power (hashrate) on the blockchain, the blockchain may become inoperable. To investigate whether this concern materializes, we examine the impact of miners’ revenue (i.e., cryptocurrency price and cryptocurrency output volume) on computing power using dynamic panel analysis, instrumental variables, and various robustness tests on miners’ panel data in the Bitcoin blockchain from 2011 to 2024. We found that cryptocurrency prices and output volumes exert a positive effect on all miners’ computing power, with a notably stronger effect observed among smaller-scale miners. The cryptocurrency price has a more positive impact on small miners, whereas the volume of cryptocurrency output has a more positive impact on large miners. Although the decrease in cryptocurrency output caused by the deflationary cryptocurrency issuance mechanism inhibits miners’ computing power expansion, the scale of large miners is more stable than that of small miners in a fluctuating cryptocurrency market. Therefore, there is a risk of large miners monopolizing the blockchain.

Suggested Citation

  • Aixing Li & Ke Gong & Jiashun Li & Li Zhang & Xueting Luo, 2025. "Is Monopolization Inevitable in Proof-of-Work Blockchains? Insights from Miner Scale Analysis," Computational Economics, Springer;Society for Computational Economics, vol. 66(3), pages 1825-1850, September.
    • Handle: RePEc:kap:compec:v:66:y:2025:i:3:d:10.1007_s10614-024-10755-6
    DOI: 10.1007/s10614-024-10755-6
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