Efstathios Polyzos

Twitter and market efficiency in energy markets: Evidence using LDA clustered topic extraction

Efstathios Polyzos, Fang Wang · Energy Economics · 2022 · 31 citations

Economics, Engineering, Data Science +12

Dynamic Returns Connectedness: Portfolio Hedging Implications During the COVID‐19 Pandemic and the Russia–Ukraine War

Ghulame Rubbaniy, Ali Awais Khalid, Konstantinos Syriopoulos et al. · Journal of Futures Markets · 2024 · 25 citations

Asset Allocation, Portfolio Management, Connectedness Approach +21

Demographic change and economic growth: The role of natural resources in the MENA region

Efstathios Polyzos, Simon Kuck, Khadija Abdulrahman · Research in Economics · 2022 · 18 citations

Economics, Demographic Change, Rural Economy +9

Autoregressive Random Forests: Machine Learning and Lag Selection for Financial Research

Efstathios Polyzos, Costas Siriopoulos · Computational Economics · 2023 · 16 citations

Inflation and the war in Ukraine: Evidence using impulse response functions on economic indicators and Twitter sentiment

Efstathios Polyzos · Research in International Business and Finance · 2023 · 13 citations

Economics, Social Media, Ukrainian Economy +9