Product-harm crises can seriously imperil a brand's performance. Consumers tend to weigh negative publicity heavily in product judgments, customer preferences may shift towards competing products during the recall period, and competitors often increase their advertising spending in the wake of a...

Factor construction methods are widely used to summarize a large panel of variables by means of a relatively small number of representative factors. We propose a novel factor construction procedure that enjoys the properties of robustness to outliers and of sparsity; that is, having relatively...

We propose a jump robust positive semidefinite rank-based estimator for the daily covariance matrix based on high-frequency intraday returns. It disentangles covariance estimation into variance and correlation components. This allows to estimate correlations over lower sampling frequencies, to...