the sample covariance matrix. The influence of refinements to these covariance estimation methods is studied. We employ …

This paper dissects with great acuteness, the issues of convergence in financial performance dynamics in the African … (Christianity and Islam). Findings provide partial support for the existence of absolute convergence in some dynamics. Only sub …-Saharan Africa reveals conditional convergence in relation to per capita number of listed companies. The speed of convergence for the …

of factor jumps. Such jump dependence is implied by standard linear factor models. Our inference is based on a panel of … restriction on the relative magnitude of these two dimensions of the panel. The test is formed from the high‐frequency returns at …