By applying SEMIFAR models (Beran, 1999), we examine 'long memory' in the volatility of worldwide stock market indices. Our analysis yields strong evidence of 'long memory' in stock market volatility, either in terms of stochastic long-range dependence or in form of deterministic trends. In some...

Based on a literature review, this paper investigates the reasons why broad money demand has usually been found to be more stable in the euro area than in other large economies. The paper concludes that there are three main explanations for this fact. First, in some countries outside the euro...

This paper analyses trends and persistence in atmospheric pollution in ten US cities over the period from January 2014 to January 2024 using fractional integration methods. The results support the hypothesis of long memory and mean reversion in atmospheric pollution in all cities examined. They...

This paper uses fractional integration methods to obtain comprehensive evidence on the evolution of the number of hot days, defined as those with temperatures above 35 °C, in 54 countries from various regions of the world over the period from 1950 to 2022. The variable analysed is a key...

This study aims at shedding light on how e-commerce contributes to climate change in European Union countries. To explore this relationship, we introduced a novel index designed to measure the evolution of climate change as the dependent variable, while considering e-commerce activities as the...

The paper examines the relationship between health and economic growth using a dynamic panel with threshold effect and endogeneity. The study uses a sample of 136 countries over the period of 1965-2015 and the results indicate that the relationship between health and economic growth is...

There is no doubt that migration is a complex phenomenon with varied economic, political, and cultural impacts on both the countries of origin as well as the countries of destination. In particular, migration fears and policy uncertainties may have positive or negative consequences on economic...

In the aftermath of the Covid pandemic rising commodity prices went hand-in-hand with a strengthening US dollar. This was a sharp contrast to the usual relationship between commodity prices and the dollar. This paper presents evidence that post-Covid correlation patterns could become more common...

This paper analyzes conditional threshold effects of stock market volatility on crude oil market volatility. We use the conditional threshold autoregressive (CoTAR) model, a novel extension of TAR from a constant to time-varying threshold. The conditional threshold is specified as an empirical...

Are conventional and sustainable cryptocurrencies effective hedging instruments for high cryptocurrency uncertainty? This paper examines co-movements between conventional (Bitcoin, Ethereum, Binance Coin, Tether) and sustainable (Cardano, Powerledger, Stellar, Ripple) cryptocurrencies and two...