This paper proposes a model of the US unemployment rate which accounts for both its asymmetry and its long memory. Our approach, based on the tests of Robinson (1994), introduces fractional integration and nonlinearities simultaneously into the same framework (unlike earlier studies employing a...

This paper examines persistence in the Ukrainian stock market during the recent financial crisis. Using two different long memory approaches (R/S analysis and fractional integration) we show that this market is inefficient and the degree of persistence is not the same in different stages of the...

This article focuses on the effect of the Covid-19 pandemic on tourism in several African countries located in Eastern and Southern Africa, focusing on five, namely, Burundi, Eswatini, Kenya, Mauritius and Seychelles which are important tourism destinations in Africa. For this purpose,...

We examine stock market responses during the COVID-19 pandemic period using fractional integration techniques by considering the data spanning from August 2nd 2019 to July 9th 2020. The evidence suggests that stock markets generally follow a synchronized movement before and during the stages of...

This paper deals with the analysis of long-run relationships of fear indices for US stocks, commodities, and the energy sector with global fear indices for stocks and oil. Departing from the classical literature, fractional integration, and cointegration techniques are used to determine the...

In this paper we have examined the unemployment rate series in Turkey by using long memory models and in particular employing fractionally integrated techniques. Our results suggest that unemployment in Turkey is highly persistent, with orders of integration equal to or higher than 1 in most...

This paper uses four ADF-type unit root tests and four KPSS-type stationarity tests to examine whether the gender unemployment gap would converge to zero in Africa. Among these different tests, the two most restricted models, namely the ADF test and the KPSS test, indicate no convergence in the...

This paper deals with the analysis of inflation in financial returns by using model-free connectedness framework which includes investigating persistence in the series and data from 22 countries from April 1958 to November 2023 which are grouped into highly, medium and lowly correlated returns....

The Infant Mortality Rates in 34 sub-Saharan countries are examined in this paper by means of focusing on the degree of persistence and non-linearities. The results indicate that half of the countries examined display non-linearities and the orders of integration are extremely large in all...

This paper investigates BRIC markets’ integration and segmentation between REITs and stock indices, and the possibility of establishing “wealth” and “credit” effects. The analysis of the relationship is based on updated techniques in time series using the concepts of fractional...