This paper investigates the relationship between Bitcoin returns and the frequency of daily abnormal returns over the period from June 2013 to February 2020 using a number of regression techniques and model specifications including standard OLS, weighted least squares (WLS), ARMA and ARMAX...

This paper provides new evidence on the stochastic behaviour of the EPU (Economic Policy Uncertainty (EPU) index constructed by Baker et al. (2016) in six of the biggest economies (Canada, France, Japan, US, Ireland, and Sweden) over the period from January 1985 to October 2019. In particular,...

This paper uses a modelling framework which includes two singularities (or poles) in the spectral density function, one corresponding to the long-run (zero) frequency and the other to the cyclical (non-zero) frequency. The adopted specification is very general, since it allows for fractional...

This paper analyses the cultural drivers (tightness−looseness and individualism−collectivism) of Bitcoin prices co-movements and exchange shutdowns in 34 major countries around the world over the period 20 July 2010 – 5 February 2020. Under the assumption that investors prefer to use local...

This paper suggests a simple valuation method based on Chebyshev approximation at Chebyshev nodes to value American put options. It is similar to the approach taken in Sullivan (2000), where the option's continuation region function is estimated by using a Chebyshev polynomial. However, in...

This note provides extensive evidence on the persistence properties of real GDP in 17 European countries and in the US over the period 1960-2023 using a fractional integration framework. The analysis suggests that in all cases shocks have permanent effects on the level of real GDP. This is...

This paper analyses trends and persistence in air pollution levels in 88 US metropolitan areas using fractional integration methods. The results indicate that the differencing parameter d is higher than 0 in 38 of the series, which supports the hypothesis of long-memory behaviour and implies...

This paper examines the stochastic behaviour of the number of earthquakes (in total and also classified by magnitude) and stock market log prices and returns in the case of Japan over the period from January 2009 to February 2024 using fractional integration methods. Their linkages are then...

This paper applies the Seo and Shin (2016) method for estimating dynamic panels with endogenous threshold effects to obtain new, robust evidence on nonlinearities in the relationship between international financial integration (IFI) and economic growth. This approach is based on a...

This paper provides a comprehensive analysis of persistence in real house prices at the quarterly frequency in 47 countries from the OECD Database using fractional integration methods. The sample period varies depending on data availability, the longest series being the Japanese one (from...