In this paper we review the existing empirical literature on price asymmetries in commodities, providing a way to classify and compare different studies which are highly heterogeneous in terms of econometric models, type of asymmetries and empirical findings. Relative to the previous literature,...

In this paper, we develop a test for the existence of a middle 'band of inaction' in a three-regime threshold vector error correction model (TVECM). A Wald statistic is proposed for this purpose, its limiting distribution is derived (which is non-standard) and critical values calculated through...

The objective of this paper is to evaluate the behaviour of Nigerian Stock Exchange (NSE) sector indices. Specifically, the paper analyzes the returns correlation, serial correlation and heteroscedasticity on the NSE All-share Index, Banking Index, Consumer Goods Index, Oil & Gas Index, NSE 30...