201 citations · 475 across the 27 of their papers we have counts for
28 papers
Generating Individual Trajectories Using GPT-2 Trained from Scratch on Encoded Spatiotemporal Data
Taizo Horikomi, Shouji Fujimoto, Atushi Ishikawa +1
Following Mizuno, Fujimoto, and Ishikawa's research (Front. Phys. 2022), we transpose geographical coordinates expressed in latitude and longitude into distinctive location tokens…
Composite distributions in the social sciences: A comparative empirical study of firms' sales distribution for France, Germany, Italy, Japan, South Korea, and Spain
Arturo Ramos, Till Massing, Atushi Ishikawa +2
We study 17 different statistical distributions for sizes obtained {}from the classical and recent literature to describe a relevant variable in the social sciences and Economics,…
Nondiagonal Mixture of Dirichlet Network Distributions for Analyzing a Stock Ownership Network
Wenning Zhang, Ryohei Hisano, Takaaki Ohnishi +1
Block modeling is widely used in studies on complex networks. The cornerstone model is the stochastic block model (SBM), widely used over the past decades. However, the SBM is limi…
Identifying the Hierarchical Influence Structure Behind Smart Sanctions Using Network Analysis
Ryohei Hisano, Hiroshi Iyetomi, Takayuki Mizuno
Smart sanctions are an increasingly popular tool in foreign policy. Countries and international institutions worldwide issue such lists to sanction targeted entities through financ…
Prediction of ESG Compliance using a Heterogeneous Information Network
Ryohei Hisano, Didier Sornette, Takayuki Mizuno
Negative screening is one method to avoid interactions with inappropriate entities. For example, financial institutions keep investment exclusion lists of inappropriate firms that…
Measurement of human activity using velocity GPS data obtained from mobile phones
Yasuko Kawahata, Takayuki Mizuno, Akira Ishii
Human movement is used as an indicator of human activity in modern society. The velocity of moving humans is calculated based on position information obtained from mobile phones. T…