Blockchain Papers

Lauren Burns, Andrea Moro

No abstract is available for this record.

Daniel Chappell

In response to Molnár and Thies (2018) demonstrating that the price data of Bitcoin contained structural breaks, we identify the optimal number of states for a Markov regime-switching (MRS) model to capture the regime heteroskedasticity of Bitcoin. We determined that the restricted 5-state MRS model provided the best goodness-of-fit scores (-AIC, -BIC, -HQIC) for the fitted sample. In addition, we found evidence of stylised characteristics in the price data of Bitcoin, namely: volatility clustering; volatility jumps; asymmetric volatility transitions; and the persistence of shocks.

Lee Reiners

No abstract is available for this record.

Stavros Stavroyiannis

The overall performance of a portfolio is the utmost measure of success for the skills of the portfolio’s manager. The Sharpe ratio and the modified Sharpe ratio have been some of the most referenced standards used in finance, to evaluate the efficiency of funds and hedge funds managers, however; such an ordering should be accompanied by proper statistical inference. In this work we examine whether Bitcoin can diversify significantly a reference portfolio composed from the five best performers of the Dow Jones Industrial Average for 2017 that is, Apple, Boeing, Caterpillar, Visa, and Walmart. The portfolios are constructed via analytical solutions in the mean-variance framework, constrained optimization for the cases of long-only and risk-parity portfolios, and an equal weight strategy. The statistical significance of the Sharpe and modified Sharpe ratios differences is examined via a variety of tests. The results indicate that Bitcoin can significantly improve only the Sharpe and modified Sharpe ratios of the minimum variance and risk-parity portfolios. On the efficient frontier, the tangent portfolios are dominated by the traditional stocks.

Xuan-Thao Nguyen

As of January 2018, there were 1,384 cryptocurrencies available, and the number continues to grow., The term "cryptocurrencies," for now, at least, covers Bitcoin; altcoins, which are simply coins that are variants or forks of Bitcoin when there is a change in the underlying codes; and tokens.Unlike Bitcoin and coins that operate on separate blockchains, tokens are issued and operated on top of a blockchain.Bitcoin enjoys its enviable leading role among all cryptocurrencies, and Ethereum follows Bitcoin in standing.At the present time and for convenience purposes in the confines of this article, the author will refer to Bitcoin as inclusive of other cryptocurrencies.

Md Altab Hossin, Sajjad Hosain

Bitcoin is a digital cryptocurrency that has attracted substantial interest in recent years from the general public, profit seekers, risk takers, academic practitioners, and, last but not least, economists. Although it is referred to as new, Bitcoin has existed since 2009 and is rooted in technology that goes back even farther. It was the first established cryptocurrency, with the first trade in 2010. Since 2015, Bitcoin has attracted even more attention because of its increase in value and volume of exchange. The Bitcoin system maintains a global, distributed cryptographic ledger of transactions, or blockchain, through a consensus algorithm running on hardware scattered around the world. This paper discusses the nature of cryptocurrency and blockchain, how it works, and the present status of Bitcoin blockchain in different countries around the world. The paper also includes a review of literature on Bitcoin engineering, Bitcoin as currency and the cryptocurrency system, related work on queuing theory, and work on competition and monopoly. The paper explores three possible outcomes with regard to the future prospects of Bitcoin. The various aspects of this technology are yet to be revealed in detail, but the authors hope that this simple, basic, and narrative paper will be helpful to those seeking basic references regarding this newest issue.

Jasmina Smgic Miladinovic, Miladinovic, Jasmina Smgic

The appearance of cryptocurrency marks the arrival of a new unlimited global system with no intermediaries and costly intercontinental transactions. Digital money would make it possible for us to have significantly quicker and cheaper transactions, which, along with present technology, is considered inevitable in the future. This paper includes three topics and deals with the bitcoin phenomenon and its influence on economic growth. The paper presents the bitcoin technology, its advantages and some risks to which the system’s users are exposed. Bitcoin represents an exceptional technical achievement, and specific features of bitcoin present a particular challenge for its users.

Morgan Ricks, John Crawford, Lev Menand

No abstract is available for this record.

Chris Berg, Sinclair Davidson, Jason Potts

No abstract is available for this record.

Valeria Ferrari

No abstract is available for this record.

Jerry Li

Identifying and quantifying the drivers for adopting blockchain technologies are important for developing effective launch plan. Technology Acceptance Model (TAM) and its derivatives have been used for this purpose. However, some of these models only use a few standardized, predetermined independent variables to collectively represent the drivers. Low predictive power of TAM leads to questions on whether this restriction may detrimentally constrain the exploration of other driving factors. Some other extended models with higher R2 are considered impractical and lack of theoretical foundations. This paper demonstrates that reasonable predictive power can be achieved even with simple, practically implementable model when research targets are sampled and segmented properly. By employing a more fundamental theory, this study has also included additional variable that would normally not be considered in TAM.

Zhi Li, Layne Liu, Ali Vatankhah Barenji, Waiming Wang

This paper proposes a cloud-based manufacturing knowledge sharing system for injection mould redesign (IMR) based on blockchain technology. In our proposed system, private cloud is used to store the IMR knowledge, and blockchain provides standards and protocols for implementing the system as well as ensuring the security in a trustless environment. K-Nearest Neighbors is used for retrieving the blockchain-based document knowledge. The proposed system not only can facilitate injection mould redesign, but also provide a mechanism for knowledge owners to share their own assets securely.

Faiza Loukil, Chirine Ghédira, Khouloud Boukadi, Aïcha Nabila Benharkat

No abstract is available for this record.

Abdirahman Gulled, Jakaria Hossain

Bitcoin is a cryptocurrencyand worldwide decentralizedpayment system. The network is conducted through peer-to-peertransactionsand these transactions are verified by using cryptography technology. Blockchain technology keeps the records of public distributed ledger. Bitcoins are created as a rewardfor the public who are interested to earn it known as ‘mining’.This currency can be converted into other currencies, services and products. Lately, Bitcoin has been emerging as the well-known digital currency and getting popularity all over the world for quick transition. Moreover, this cryptocurrency will be a potential financial asset for investors because of its profitable returns. The researchers perceived that there is a significant impact of Bitcoin upon traditional transaction system which influenced us to conduct this study. The purpose of this research is to remark the ways how Bitcoin challenges the traditional transaction systemand to assess the future planning structure for traditional financial institutions to compete with digital currency. Bitcoin is the profitable platform for the miners and the investors, but little bit threat for the traditional bankers and the governments. Therefore, the attitudes and ideas of people (related with Bitcoin dealings) from different background have been assessed and analyzed for this research. The authors conducted questionnaires among the people who are acquainted with both Bitcoin and traditional transaction system and tried to find out solution of research question. We used a qualitative research methodology where we conducted semi-structured interviews. The data has been analyzed based upon the interviewees’ perspective. While preparing this research paper the authors examined the previous research in this field. In addition, there are lots of scope for further research regarding Bitcoin issue, as well as the opportunities and threats for the other financial institutions. The researchers explained the suggestions for further research which might be the guidelines for the traditional financial institutions. We faced some limitations and problems from different aspects to accomplish this research paper. The researchers came to the conclusion that Bitcoin is a challengeable instrument for the traditional transaction system. However, this cryptocurrency has some unavoidable risk and the questionable image which often used to support criminal activities. As because there is no governing authority, clearing house or central bank's involvement; thus, it bears uncertainty for the Bitcoin stockholders. In this study, we have been able to deepen the knowledge and found the solution how Bitcoin affects the traditional transaction system.

Aleksandar Đorđević, Dordevic, Aleksandar

During the history there have been different examples of incorporating technology into economics. Some of them include SWIFT, e-banking, mobile payments, and many more. Technology had to be commercialized and put into service of facilitating economic processes. International finances underwent the process of development too. With the globalization process national economies became more interconnected and dependent from each other. Individuals demanded a faster and more convenient way to make international payments. Internet trade is on the rise, social media rule the contemporary world, and then appears the inception of so-called crypto currencies. The most famous is Bitcoin. Where lays its place in the economic science? It looks like that Bitcoin is going towards decentralization of the monetary system known by now. The goal of this paper is to raise the awareness of the changes happening in economy and in economic science.

Nur Rizqi Febriandika, Raditya Sukmana

No abstract is available for this record.

Ying Chen, Simon Trimborn, Jiejie Zhang

No abstract is available for this record.

Andrew LR, Douglas AO

Bitcoin is a decentralized, pseudonymous, virtual currency which has been linked to many nefarious activities, such as money laundering, ransomware demands, and the purchase of contraband goods and services. Although it has many redeeming features such as low transaction costs, no charge-backs, and service to the world’s 2.5 billion unbanked, the public has become aware of Bitcoin through spectacular news stories of corruption and criminal activities. Techniques to investigate Bitcoin and to identify its users are therefore required to enforce laws and protect the public. This paper discusses what Bitcoin is and how it works, and explores various investigative methodologies to perform Bitcoin network analysis, transactional analysis, and wallet analysis. Finally, this paper discusses emerging issues and suggests areas for improvement with the goal of gaining general acceptance of investigative techniques for admissibility as scientific evidence in courtroom testimony.

Shehu M. Sarkintudu, Huda Ibrahim, Alawiyah Abd Wahab

Blockchain platform has given information system scholars research opportunities in understanding dynamics of convergence of technology and social context. The information system research issues are complex and require taxonomies to understand the similarities and uniqueness among objects. Developing taxonomies is a complex process that needs systematic approach. This paper is a research-in-progress. We proposed taxonomy for Blockchain platform using existing method of developing taxonomies in information systems. With the unprecedented growth led to several companies to develop the varieties of Blockchain platforms. The complexity in the implementation and understanding the technical protocols leading to difficulty face by researchers and practitioners to access their full potentials. To bridge the gap, we proposed a taxonomy of Blockchains distributed ledger platforms in order to provide a mechanism for researchers and practitioners to understand the phenomenon. Final of taxonomy contains five (5) dimensions with fifteen (15) characteristics. Our analysis discovered Blockchain platforms are designed with specific goals, which prescribe its features, i.e FinTech Blockchain platforms for financial domain.

Noureddine Lasla, Mohamed Younis, Wassim Znaïdi, Dhafer Ben Arbia

Cooperative Intelligent Transportation System (C- ITS) enables inter-networking of vehicles for alerts exchanging in order to improve road safety. While this technology is about to enter the market in the upcoming years, critical questions related to the communication security continue to be challenging research concerns. Current solutions to secure inter-vehicle communication depend mainly on the use of digital certificates for authentication. However, such an approach imposes significant overhead on vehicles since it is computationally demanding and requires validation of the certificate within a limited period. In addition, relying on a central node for deciding on issuing and revoking certificates introduces a single point of failure and could even risk the safety of motorists. In this paper, we propose the use of Blockchain to keep track of the certificate of each vehicle (valid or revoked) in distributed and immutable records. In essence we replace certificate verification with a lightweight blockchain-based authentication approach. In addition, we propose a fully distributed vehicle admission/revocation scheme. We show that our scheme could alleviate the computation overhead and enhance the response time while improving the overall system security.

Simone Fabiano

No abstract is available for this record.

Elizaveta Lebedeva

No abstract is available for this record.

Andreas Hanl

Cryptocurrencies such as Bitcoin might revolutionize the economy through enabling peer-to-peer based transactions by abolishing the need for a trusted intermediary. As for now, Bitcoin remains to be the best recognized cryptocurrency, in particular in terms of market capitalization. However, as this paper shows, there are plenty of alternatives. This paper outlines the historical roots which have led to the creation of privately emitted, cryptography based digital currencies. Additionally, this paper discusses future possible hurdles of the development of cryptocurrencies and outlines features which might influence the success of a cryptocurrency. Insights into the beginning of cryptocurrency development are gained by analysis of the publicly available DOACC dataset. The paper does so by providing an overview of the techniques and mechanisms used by cryptocurrencies. It shows that newly created cryptocurrencies tend to be very similar in some properties in the early stages but new features and more diversity developed in more recent years. Additionally, newly created cryptocurrencies tend more and more to create a fixed number of coins before the initial announcement in order to sell these in Initial Coin Offerings. Even when the amount of premining increases over years, it remains at lower levels on the aggregate.

Dominique Guégan, Marius Frunza

The aim of this research is to explore the econometric features of Bitcoin-USD rates. Various non-Gaussian models are fitted to daily returns in order to underline the unique characteristics of Bitcoin when compared to other more traditional currencies. Market efficiency hypothesis is tested further, and the main reasons for breaches in efficiency are discussed. The main goal of the paper is to assess the presence of bubble effects in this market with customized tests able to detect the timing of various bubbles. The results show that the Bitcoin prices had two episodes of rapid inflation in 2013 and 2017.