In this study, we test the efficient market hypothesis for a number of sectors in the US stock
market during the COVID-19 pandemic to identify its effects on individual sectors. To test this …

Corruptive practices refer to the abuse of power for private benefits, and include a wide
range of hidden, unethical conduct at both the individual and organisational levels. This …

This paper studies the efficiency of Brazilian activity sectors. For that, we apply the
Macroeconophysics Indicator of Economic Efficiency (MIEE) for each sector's index of the …

This paper introduces new methods for studying the prevalence of terrorism around the
world and over time. Our analysis treats spatial prevalence of terrorism, the changing profile …

The sporadic large fluctuations seen in the stock market are due to different factors. These
large fluctuations are termed extreme events (EE). We have identified fundamental …

The existing literature on corporate disclosures suggests that managerial sentiments are the
outcome of the firm's financial performance. We extend this line of research and examine …

The financial markets are understood as complex dynamical systems whose dynamics is
analysed mostly using nonstationary and brief data sets from stock markets. For such data …

The time series of cryptocurrency prices provide a unique window into their value and
fluctuations. In this study, an ordinal partition network is constructed using the price signals …

This paper investigates the temporal patterns of activity in the cryptocurrency market with a
focus on Bitcoin, Ethereum, Dogecoin, and WINkLink from January 2020 to December 2022 …

The low-carbon transition of the energy system plays a crucial role in achieving carbon
neutrality. However, the development of new energy heavily relies on rare earth resources …