The web appendix shows the characteristics of the sample in terms of the explanatory variables.
In terms of explanatory variables, in order to avoid omitting any significant variables, all variables resulting from the step one analysis are re-introduced.
Fixed-effect model represents the observed quantities in terms of explanatory variables that were treated as if the quantities were non-random.
We express the Log(100 × Mean number of Estimated Portions) in terms of explanatory variables (x ij) and their interactions.
Moreover, CART appears as a very simple and efficient discriminant technique leading to a straightforward data interpretation in terms of explanatory variables.
Across all selected models, we examined the significance of each explanatory variable through two-tailed t-tests for evaluating its role in determining the response variable52.
The test regresses the squared residuals from estimation of model 2 (i.e. Open image in new window on the explanatory variables included in model(2), the explanatory variables from model (2) squared and interaction terms of the explanatory variables from model (2).
Assuming that every variable is supposed to explain the dependent variable with low uncertainty, it follows that variables which perform poorly in terms of explanatory power (i.e. low PIP) should be excluded.
Additional latent variables beyond three had marginal explanatory power due to the fact that the majority of the variation in the X matrix could be described in terms of these latent variables, therefore three components were used for all analyses.
The aim of the general linear model is to explain the variation of the time course, y1,…, y i,…, y n, in terms of a linear combination of explanatory variables plus a Gaussian error term.
His methodology, outlined in The Methodology of Positive Economics in Essays in Positive Economics (1953), was that you should use the method that works best, that best explains and predicts final outcomes in terms of the most parsimonious set of explanatory variables.
