… Takayasu 1990 … Reprinted in 1990 British Library cataloguing in publication data
Takayasu, H. … Finally, I express my gratitude to my wife Misako Takayasu for her devoted help …

One-dimensional traffic flow is simulated by a cellular-automaton-type discrete model. As we
increase the car density, the model shows a phase transition between a jam phase and a …

We analyze statistical properties of a set of deterministic threshold elements which is
introduced as a model for the stock market. The macroscopic variable of the stock market price …

Financial fluctuations were generally neglected in classical ecnomics and their basic statistical
properties have only recently been elucidated in the emerging field of econophysics, a …

We introduce a novel description of the dynamics of the order book of financial markets as
that of an effective colloidal Brownian particle embedded in fluid particles. The analysis of …

Distribution functions of annual income of companies are analyzed based on two company
databases. A clear power law distribution consistent with the Zipf's law can be confirmed for …

A general discrete stochastic process involving random amplification with additive external
noise is analyzed theoretically and numerically. Necessary and sufficient conditions to realize …

By analyzing the foreign exchange market data of various currencies, we derive a hierarchical
taxonomy of currencies constructing minimal-spanning trees. Clustered structure of the …

Some economic phenomena are predictable and controllable, and some are impossible to
foresee. Existing economic theories do not provide satisfactory answers as to what degree …

We focus on Internet rumors and present an empirical analysis and simulation results of
their diffusion and convergence during emergencies. In particular, we study one rumor that …