201 citations · 475 across the 27 of their papers we have counts for
6 papers · 1 filter
Statistical Laws in the Income of Japanese Companies
Takayuki Mizuno, Makoto Katori, Hideki Takayasu +1
Following the work of Okuyama, Takayasu and Takayasu [Okuyama, Takayasu and Takayasu 1999] we analyze huge databases of Japanese companies' financial figures and confirm that the Z…
The mean-field approximation model of company's income growth
Takayuki Mizuno, Misako Takayasu, Hideki Takayasu
We introduce a mean-field type approximation for description of company's income statistics. Utilizing huge company data we show that a discrete version of Langevin equation with a…
Time-scale dependence of correlations among foreign currencies
Takayuki Mizuno, Shoko Kurihara, Misako Takayasu +1
For the purpose of elucidating the correlation among currencies, we analyze daily and high-resolution data of foreign exchange rates. There is strong correlation for pairs of curre…
Investment strategy based on a company growth model
Takayuki Mizuno, Shoko Kurihara, Misako Takayasu +1
We first estimate the average growth of a company's annual income and its variance by using both real company data and a numerical model which we already introduced a couple of yea…
Analysis of high-resolution foreign exchange data of USD-JPY for 13 years
Takayuki Mizuno, Shoko Kurihara, Misako Takayasu +1
We analyze high-resolution foreign exchange data consisting of 20 million data points of USD-JPY for 13 years to report firm statistical laws in distributions and correlations of e…
The mechanism of double exponential growth in hyper-inflation
Takayuki Mizuno, Misako Takayasu, Hideki Takayasu
Analyzing historical data of price indices we find an extraordinary growth phenomenon in several examples of hyper-inflation in which price changes are approximated nicely by doubl…