however in iceland all increases were from a much smaller base it is important to have the same countries in the model for every wave in order to be able to compare changes in the estimates across the waves of the survey italy had to be excluded because there is no data in the samip dataset for it from onwards as before the anchored poverty definition is used here the dependent variable is whether the child under lives in a household with equivalent disposable income below of national median estimated in and then uprated for inflation