Tony Klein

2.7k total citations · 2 hit papers
56 papers, 1.9k citations indexed

About

Tony Klein is a scholar working on Economics and Econometrics, Finance and General Economics, Econometrics and Finance. According to data from OpenAlex, Tony Klein has authored 56 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 47 papers in Economics and Econometrics, 29 papers in Finance and 11 papers in General Economics, Econometrics and Finance. Recurrent topics in Tony Klein's work include Market Dynamics and Volatility (40 papers), Financial Risk and Volatility Modeling (18 papers) and Complex Systems and Time Series Analysis (12 papers). Tony Klein is often cited by papers focused on Market Dynamics and Volatility (40 papers), Financial Risk and Volatility Modeling (18 papers) and Complex Systems and Time Series Analysis (12 papers). Tony Klein collaborates with scholars based in United Kingdom, Germany and China. Tony Klein's co-authors include Thomas Walther, Elie Bouri, Najaf Iqbal, Abdullah Alqahtani, Qiang Ji, Yi‐Shuai Ren, Jiawen Luo, Ali Awais Khalid, Neda Todorova and Lanouar Charfeddine and has published in prestigious journals such as Energy Policy, Energy and Journal of Environmental Management.

In The Last Decade

Tony Klein

53 papers receiving 1.9k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Bitcoin is not the New Gold – A comparison of volatility, correlation, and portfolio performance

2018 606 citations Tony Klein, Thomas Walther et al. International Review of Financial Analysis profile →
Climate policy uncertainty and the price dynamics of green and brown energy stocks

2022 253 citations Elie Bouri, Tony Klein et al. Finance research letters profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Tony Klein United Kingdom	18	1.7k	644	564	295	255	56	1.9k
Yonghong Jiang China	22	1.5k 0.9×	359 0.6×	389 0.7×	330 1.1×	294 1.2×	36	1.6k
Khaled Mokni Tunisia	26	1.7k 1.0×	337 0.5×	451 0.8×	432 1.5×	286 1.1×	56	1.8k
Sang Hoon Kang South Korea	21	1.8k 1.0×	316 0.5×	911 1.6×	239 0.8×	472 1.9×	39	1.9k
Тамара Теплова Russia	22	1.6k 1.0×	299 0.5×	493 0.9×	263 0.9×	271 1.1×	97	2.0k
Refk Selmi France	21	1.5k 0.9×	455 0.7×	341 0.6×	333 1.1×	307 1.2×	56	1.6k
Mariya Gubareva Portugal	28	2.1k 1.3×	514 0.8×	708 1.3×	319 1.1×	323 1.3×	89	2.4k
Emmanuel Joel Aikins Abakah Ghana	27	2.8k 1.6×	552 0.9×	913 1.6×	605 2.1×	305 1.2×	104	3.0k
Jamal Bouoiyour France	18	1.3k 0.8×	459 0.7×	337 0.6×	289 1.0×	354 1.4×	68	1.6k
Francisco Jareño Spain	25	2.1k 1.2×	418 0.6×	615 1.1×	464 1.6×	406 1.6×	97	2.3k
Ahmed H. Elsayed United Kingdom	25	1.6k 1.0×	375 0.6×	523 0.9×	314 1.1×	299 1.2×	57	1.9k

Countries citing papers authored by Tony Klein

Since Specialization

Citations

This map shows the geographic impact of Tony Klein's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Tony Klein with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Tony Klein more than expected).

Fields of papers citing papers by Tony Klein

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Tony Klein. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Tony Klein. The network helps show where Tony Klein may publish in the future.

Co-authorship network of co-authors of Tony Klein

This figure shows the co-authorship network connecting the top 25 collaborators of Tony Klein. A scholar is included among the top collaborators of Tony Klein based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Tony Klein. Tony Klein is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ren, Yi‐Shuai, et al.. (2025). Is the Stock Market Performance Vulnerable to the Russian–Ukrainian War? Evidence From the Twitter Sentiment Index. International Journal of Finance & Economics. 31(1). 1444–1471.

Ren, Yi‐Shuai, et al.. (2025). Dynamic connectedness between crude oil futures and energy industrial bond credit spread: Evidence from China. Energy Economics. 143. 108294–108294.

Ren, Yi‐Shuai, Tony Klein, & Jiang Yong. (2025). Corporate investment decisions amid climate risks: Relocate or stay?. Journal of International Money and Finance. 157. 103388–103388. 2 indexed citations

Yong, Jiang, Tony Klein, Olaf Weber, & Yi‐Shuai Ren. (2025). Fintech and Green Investor Entry. International Review of Economics & Finance. 104. 104715–104715. 1 indexed citations

Ren, Yi‐Shuai, Tony Klein, & Yong Jiang. (2025). Unveiling the asymmetric dynamic spillovers in industry bond credit risk: Is the energy industry the prime mover?. International Review of Financial Analysis. 101. 104014–104014. 2 indexed citations

Jiang, Yong, Tony Klein, Yi‐Shuai Ren, & J. P. Dai. (2025). Through the looking glass: Unveiling geopolitical risks and sovereign bond spillovers in the eurozone. International Review of Financial Analysis. 103. 104190–104190. 4 indexed citations

Ma, Chaoqun, et al.. (2025). Decoding the nexus: How fintech and AI stocks drive the future of sustainable finance. International Review of Economics & Finance. 98. 103877–103877. 8 indexed citations

Klein, Tony, et al.. (2024). Interactions between sustainable bonds, renewable energy and other financial markets: A macroprudential perspective. Energy Economics. 138. 107839–107839. 2 indexed citations

Yong, Jiang, Tony Klein, Yi‐Shuai Ren, & Duy Duong. (2024). Global geopolitical risk and corporate ESG performance. Journal of Environmental Management. 370. 122481–122481. 25 indexed citations

10.

Luo, Jiawen, Tony Klein, Thomas Walther, & Qiang Ji. (2024). Forecasting realized volatility of crude oil futures prices based on machine learning. Journal of Forecasting. 43(5). 1422–1446. 5 indexed citations

11.

Ren, Yi‐Shuai, Tony Klein, & Jiang Yong. (2024). Monetary policy uncertainty and green investment decisions: A cross-national spillover perspective. International Review of Financial Analysis. 96. 103642–103642. 4 indexed citations

12.

Klein, Tony & Thomas Walther. (2024). Advances in Explainable Artificial Intelligence (xAI) in Finance. Finance research letters. 70. 106358–106358. 5 indexed citations

13.

Klein, Tony, et al.. (2023). Reinforcement Learning and Portfolio Allocation: Challenging Traditional Allocation Methods. SSRN Electronic Journal. 2 indexed citations

14.

Alqahtani, Abdullah & Tony Klein. (2021). Oil price changes, uncertainty, and geopolitical risks: On the resilience of GCC countries to global tensions. Energy. 236. 121541–121541. 75 indexed citations

15.

Walther, Thomas, Tony Klein, & Elie Bouri. (2018). Exogenous Drivers of Bitcoin and Cryptocurrency Volatility – A Mixed Data Sampling Approach to Forecasting. Econstor (Econstor). 5 indexed citations

16.

Klein, Tony, et al.. (2018). Bitcoin is not the New Gold – A comparison of volatility, correlation, and portfolio performance. International Review of Financial Analysis. 59. 105–116. 606 indexed citations breakdown →

17.

Klein, Tony, et al.. (2018). Value-at-Risk for South-East Asian Stock Markets: Stochastic Volatility vs. GARCH. Journal of risk and financial management. 11(2). 18–18. 4 indexed citations

18.

Klein, Tony & Thomas Walther. (2017). Fast fractional differencing in modeling long memory of conditional variance for high-frequency data. Finance research letters. 22. 274–279. 13 indexed citations

19.

Klein, Tony. (2017). Trend Contagion in WTI and Brent Crude Oil Spot and Futures Prices - A Spread and Correlation Analysis. 2 indexed citations

20.

Klein, Tony & Thomas Walther. (2016). Oil price volatility forecast with mixture memory GARCH. Energy Economics. 58. 46–58. 92 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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