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Jiahua Xu

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A Game-Theoretic Analysis of Cross-Chain Atomic Swaps with HTLCs

To achieve interoperability between unconnected ledgers, hash time lock contracts (HTLCs) are commonly used for cross-chain asset exchange. The solution tolerates transaction failure, and can "make the best out of worst" by allowing transacting agents to a ...

IEEE COMPUTER SOC2021

A Game-Theoretic Analysis of Cross-ledger Swaps with Packetized Payments

Jiahua Xu

We propose a game-theoretic framework to study the outcomes of packetized payments, a cross-ledger transaction protocol, with strategic and possibly malicious agents. We derive the transaction failure rate and demonstrate that without disciplinary mechanis ...

SPRINGER-VERLAG BERLIN2021

Liquidations: DeFi on a Knife-Edge

Jiahua Xu

The trustless nature of permissionless blockchains renders overcollateralization a key safety component relied upon by decentralized finance (DeFi) protocols. Nonetheless, factors such as price volatility may undermine this mechanism. In order to protect p ...

SPRINGER-VERLAG BERLIN2021

Dating Death: An Empirical Comparison of Medical Underwriters in the U.S. Life Settlements Market

Jiahua Xu

The value of a life settlement investment, manifested through a traded life insurance policy, is highly dependent on the insured's life expectancy (LE). LE estimation in life settlements relies heavily on medical underwriting. Employing different evaluatio ...

2020

Carbon Trading with Blockchain

Jiahua Xu

Blockchain has the potential to accelerate the worldwide deployment of an emissions trading system (ETS) and improve the efficiency of existing systems. In this paper, we present a model for a permissioned blockchain implementation based on the successful ...

Springer Nature2020

Are insurance balance sheets carbon-neutral? Harnessing asset pricing for climate change policy(dagger)

Jiahua Xu

Due to its enormous size and capital base, the insurance industry has the potential to play a key role in countering climate change. To this end, the major capital flows associated with its investment and underwriting businesses would need to be redirected ...

PALGRAVE MACMILLAN LTD2019

The Anatomy of a Cryptocurrency Pump-and-Dump Scheme

Jiahua Xu

While pump-and-dump schemes have attracted the attention of cryptocurrency observers and regulators alike, this paper represents the first detailed empirical query of pump-and-dump activities in cryptocurrency markets. We present a case study of a recent p ...

USENIX ASSOC2019