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Blockchain Economics

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  • Joseph Abadi
  • Markus Brunnermeier

Abstract

The fundamental problem in digital record-keeping is to establish consensus on an update to a ledger, e.g., a payment. Consensus must be achieved in the presence of faults—situations in which some computers are offline or fail to function appropriately. Traditional centralized record-keeping systems rely on trust in a single entity to achieve consensus. Blockchains decentralize record-keeping, dispensing with the need for trust in a single entity, but some instead build a consensus based on the wasteful expenditure of computational resources (proof-of-work). An ideal method of consensus would be tolerant to faults, avoid the waste of computational resources, and be capable of implementing all individually rational transfers of value among agents. We prove a Blockchain Trilemma: any method of consensus, be it centralized or decentralized, must give up (i) fault-tolerance, (ii) resource-efficiency, or (iii) full transferability.

Suggested Citation

  • Joseph Abadi & Markus Brunnermeier, 2018. "Blockchain Economics," NBER Working Papers 25407, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:25407
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    More about this item

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • E42 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Monetary Sytsems; Standards; Regimes; Government and the Monetary System
    • G29 - Financial Economics - - Financial Institutions and Services - - - Other

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