Purpose – The purpose of this paper is to develop an approach for implementing business excellence (BE) based on prevailing corporate culture and to propose relevant gates to monitor the corporate culture in the way to excellence. Design/methodology/approach – This research demonstrates a...

Purpose – The purpose of this paper is to propose a roadmap for operationalizing EFQM excellence model based on the RADAR logic and in parallel develop a new concept for selecting the firm-specific EFQM measures based on the level of maturity and the prevailing corporate culture....

We present a new procedure for detecting multiple additive outliers in GARCH(1,1) models at unknown dates. The outlier candidates are the observations with the largest standardized residual. First, a likelihood-ratio based test determines the presence and timing of an outlier. Next, a second...

Dummy variables can be used to detect, validate and measure the impact of outliers in data. This paper uses a model to evaluate the effectiveness of dummy variables in detecting outliers. While generally confirming some findings in the literature, the model refutes the presumption that the...

This article investigates power and size of some tests for exogeneity of a binary explanatory variable in count models by conducting extensive Monte Carlo simulations. The tests under consideration are Hausman contrast tests as well as univariate Wald tests, including a new test of notably easy...

We present a new procedure for detecting multiple additive outliers in GARCH(1,1) models at unknown dates. The outlier candidates are the observations with the largest standardized residual. First, a likelihood-ratio based test determines the presence and timing of an outlier. Next, a second...