So we shouldrealize that the contemporaryvalueofthetraditionalfilial pietyideamustsee clearly the difficulty, and set up the theory, andcarryon the conversion of the timeson the methods.
Ezra Susser, an epidemiologist at Columbia, realised that a famine experienced by the Dutch at the end of the second world war had created an ideal set of subjects for a study of maternal malnutrition and filial psychopathology.