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Shapes of Engel curves and demand curves ; implications of the expenditure allocation model, applied to dutch data
Somermeyer, W. H., (1971)
Shapes of Engel curves and demand curves : implications of the expenditure allocation model, applied to Dutch data
Somermeyer, W. H., (1972)
Optimal specification of incentive remueration systems
Langhout, A., (1970)