A large collection of daily time series for 60 world currencies’ exchange rates is considered. The correlation matrices are calculated and the corresponding Minimal Spanning Tree (MST) graphs are constructed for each of those currencies used as reference for the remaining ones. It is shown that multiplicity of the MST graphs’ nodes to a good approximation develops a power like, scale free distr...

Although recent data on electronic commerce (e-commerce) shows vital growth, the role of electronic money in e-commerce is still unclear. Critical success factors for electronic money found in the literature are briefly summarized with special focus on gold-backed forms of Internet-based payment systems. It is shown that the gold standard can be implemented as a currency regime not only for phy...

In this paper we develop a model to identify real exchange rate and output shocks in the African CFA Franc Zone and in Dollar-pegging Caribbean countries (including members of the East Caribbean Currency Union). These two groups of countries each comprise states using several different local currencies: on the one hand the BCEAOCFA Franc and the BEAC-CFA Franc (both pegged to the Euro), on the ...

We make clear why virtual currencies are of interest, how self-regulation has failed, and what useful lessons can be learned. Finally, we produce useful and semi-permanent findings into the usefulness of virtual currencies in general, blockchains as a means of mining currency, and the profundity of Bitcoin as compared with the development of block chain technologies. We conclude that though Bit...

The classical technical analysis methods of financial time series based on the moving average and momentum is recalled. Illustrations use the IBM share price and Latin American (Argentinian MerVal, Brazilian Bovespa and Mexican IPC) market indices. We have also searched for scaling ranges and exponents in exchange rates between Latin American currencies (ARS, CLP , MXP ) and other major currenc...

The aim of this paper is to examine indications for a common currency system on the Internet for spontaneous transactions. First the framework for such a currency system and the theoretical background on common currencies are discussed. Examples of common currencies already in use are evaluated according to a set of criteria developed by the authors. Furthermore the theoretical ideas and the in...

With the rise of Bitcoin and other virtual currencies, it has become crucial for government regulatory bodies to catch up. Black market sites like the now-defunct Silk Road have continued to exploit the anonymity of Bitcoin to engage in illegal transactions. In order to identify criminal Bitcoin users, the government must respond with an updated criminal subpoena standard that addresses virtual...

We describe a new replicated-object protocol designed for use in mobile and weakly-connected environments. The protocol differs from previous protocols in combining epidemic information propagation with voting, and in using fixed per-object currencies for voting. The advantage of epidemic protocols is that data movement only requires pair-wise communication. Hence, there is no need for a majori...

This paper proposes a simple chartist-fundamentalist model in which we allow for nonlinear time variation in chartists’ extrapolation rate. Estimation of the model using monthly data for the major currencies vis-a-vis the US dollar shows that the model is significant in-sample and that it has out-of-sample predictive power for some of the currencies. We investigate the power of tests of the ran...