**5. Content**

As evoked above, econophysics has many connections with several subfields and this Special Issue aimed at capturing this intellectual richness. With this purpose, the content of this issue can be summarised as follows:

**i. Econophysics as a Complex System: History, Economic Freedom, State of the art, and Econophysics Perspectives**

Economic freedom: The Top, the Bottom, and the Reality. I. 1997–2007 by *Marcel Ausloos and Philipe Broniet*

Plotting the Words of Econophysics *by Gianfranco Tusset*

Development of Econophysics: A Biased Account and Perspective from Kolkata *by Bikas K. Chakrabarti and Antika Sinha*

Radical Complexity *by Jean-Philippe Bouchaud*

Three Decades in Econophysics—From Microscopic Modelling to Macroscopic Complexity and Back *by Alex Smolyak and Shlomo Havlin*

Valuing the Future and Discounting in Random Environments: A Review *by Jaume Masoliver, Miquel Montero, Joseph Perello, J. Doyne Farmer, and John Geanakop*

#### **ii. Time Series Analysis**

Relationship between Continuum of Hurst Exponents of Noise-like Time Series and the Cantor Set *by Maria C. Mariani, William Kubin, Peter K. Asante, Joe A. Guthrie, and Osei K. Tweneboah*

Financial Return Distributions: Past, Present, and COVID-19 *by Marcin Watorek, Jarosłw Kwapie ´n, and Stanisław Drozd˙ z˙*

#### **iii. Correlation, Memory, Dependence and Relatedness**

Continuous Time Random Walk with Correlated Waiting Times. The Crucial Role of Inter-trade Times in Volatility Clustering *by Jarosław Klamut and Tomasz Gubiec*

Understanding Changes in the Topology and Geometry of Financial Market Correlations during a Market Crash *by Peter Tsung-Wen Yen, Kelin Xia, and Siew Ann Cheong*

Understanting the Nature of the Long-Range Memory Phenomenon in Socioeconomic Systems by *Rytis Kazakeviˇcius, Aleksejus Kononovicius, Bronislavas Kaulakys, and Vygintas Gontis*

Are Mobility and COVID-19 Related? A Dynamic Analysis for Portuguese Districts *by Antonio Casa Nova, Paulo Ferreira, Dora Almeida, Andreia Dionisio, and Derick Quintino*

Evolving Network Analysis of S&P500 Components: COVID-19 Influence of Cross-Correlation Network Structure *by Janusz Mi´skiewicz and Dorota Bonarska-Kujawska*

Effects of Vaccination Efficacy on Wealth Distribution in Kinetic Epidemic Models *by Emanuele Bernardi, Lorenzo Pareschi, Giuseppe Toscani, and Mattia Zanella*

Asymmetric Relatedness from Partial Correlation *by Carlos Saenz de Pipaon Perez, Andrea Zaccaria, and Tiziana Di Matteo*

#### **iv. Currency and Cryptocurrency Markets**

Network Analysis of Cross-Correlations on Forex Market during Crises. Globalisation on Forex Market *by Janusz Mi´skiewicz*

Neural Networks for Estimating Speculative Attacks Models *by David Alaminios, Fernando Aguilar-Vijande, and José Ramón Sánchez-Serraino*

What Drives Bitcoin? An Approach from Continuous Local Transfer Entropy and Deep Learning Classification Models *by Andrés Garcia-Medina and Toan Luu Duc Huynh*

Cryptocurrency Market Consolidation in 2020–2021 *by Jarosław Kwapie ´n, Marcin W ˛atorek, and Stanisław Drozd˙ z˙*

#### **v. Stock Market**

Analysis of Individual High-Frequency Traders' Buy–Sell Order Strategy Based on Multivariate Hawkes Process *by Hiroki Watari, Hideki Takyeasu, and Misako Takayasu*

The Stock Market Model with Delayed Information Impact from a Socioeconomic View *by Zhiting Wang, Guiyuan Shi, Mingsheng Shang, and Yuxia Zhang*

A Maximum Entropy Model of Bounded Rational Decision-Making with Prior Beliefs and Market Feedback *by Benjamin Patrick Evans and Mikhail Ptokopenko*

Heterogeneous Criticality in High Frequency Finance: A Phase Transition in Flash Crashes *by Jeremy D. Turiel and Tomasso Aste*

A New Look at Calendar Anomalies: Multifractality and Day-of-the-Week Effect *by Darko Stosic, Dusan Stosic, Irena Vodenska, H. Eugene Stanley, and Tatjana Stosic*

#### **vi. Company Market**

Learning Your Options: Option-Based Model of Export Readiness and Optimal Export *by Kirill Ilinski*

Multifractal Company Market: An Application to the Stock Market Indices *by Michał Chorowski and Ryszard Kutner*

On the Mortality of Companies *by Peter Richmond and Bertrand M. Roehner*

#### **vii. Economics vs. Thermodynamics**

Econophysics and the Entropic Foundations of Economics *by J. Barkley Rosser, Jr.* Energy, Entropy, Constraints, and Creativity in Economic Growth and Crises *by Reiner Kümel and Dietmar Lindenberger*

#### **viii. Financial Risk**

Aspects of a Phase Transition in High-Dimensional Random Geometry *by Axel Prüser, Imre Kondor, and Andreas Engel*

Optimizing Expected Shortfall under an l1 Constraint—An Analytic Approach *by Gábor Papp, Imre Konndor, and Fabio Cacciol*

#### **ix. Holistic View**

Victory Tax: A Holistic Income Tax System *by Donald J. Jacobs*

Highway Freight Transportation Diversity of Cities Based on Radiation Models *by Li Wang, Jun-Chao Ma, Zhi-Qiang Jiang, Wanfeng Yan, and Wei-Xing Zhou*

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
