Editorial: Light distribution – a missing variable

Industrial quality : a missing economic variable

Industrial quality is presented as a direct result of manufacturing practices (e.g. tolerance allocation, process selection, inspection procedures). A quality indicator is developed that allows for the computation of a function representing the cost of an industrial product versus its quality level. This cost function is then incorporated in an economic model that estimates the consumer's deman...

Missing in action: Species competition is a neglected predictor variable in species distribution modelling

The central role of species competition in shaping community structure in ecosystems is well appreciated amongst ecologists. However species competition is a consistently missing variable in Species Distribution Modelling (SDM). This study presents results of our attempt to incorporate species competition in SDMs. We used a suit of predictor variables including Soil Adjusted Vegetation Index (S...

Erratum: missing competing interests in editorial

[This corrects the article DOI: 10.4322/acr.2015.010.].

Random Forest variable importance with missing data

Random Forests are commonly applied for data prediction and interpretation. The latter purpose is supported by variable importance measures that rate the relevance of predictors. Yet existing measures can not be computed when data contains missing values. Possible solutions are given by imputation methods, complete case analysis and a newly suggested importance measure. However, it is unknown t...

ethnicity: a missing variable when defining normative values for reporting echocardiographic studies