This special issue was born from a Workshop organized by the e-Business & e-Government Special Interest Group of the British Academy of Management (BAM), held on the 3rd-4th May at Brunel University Business School in London. The central theme of the workshop was on the relationship between...

Smooth mixtures, i.e. mixture models with covariate-dependent mixing weights, are very useful flexible models for conditional densities. Previous work shows that using too simple mixture components for modeling heteroscedastic and/or heavy tailed data can give a poor fit, even with a large...