Graphical models simplify the analysis of multivariate observations by summarizing conditional independences in the data. Variables are represented by nodes, and the absence of an edge between two nodes signifies their conditional independence. While graphical modelling has been used in several...

In previous studies, measures of technical inefficiency effects derived from stochastic production frontiers have been estimated from residuals which are sensitive to specification errors. This study corrects for this inaccuracy by extending the doubly heteroscedastic stochastic cost frontier...

This paper presents findings from a major research study investigating management training and development (MTD) activity within small and medium‐sized enterprises (SMEs) in the East Midlands. Despite the fact that the academic evidence linking training and development with business...