SPOŻYCIE OWOCÓW W POLSCE – ANALIZA NA PODSTAWIE JEDNORÓWNANIOWYCH NIELINIOWYCH MODELI EKONOMETRYCZNYCH
FRUIT CONSUMPTION IN POLAND – ANALYSIS ON THE BASIS OF SINGLE-EQUATION NONLINEAR ECONOMETRIC MODELS

Summary/Abstract: The article dealt with an assessment of the fit of typical non-linear demand models for fruit. The power function, the exponential function with the inverse and the Törnquist function for the basic goods were used in the econometric analysis. The models were estimated on the basis of income quintile groups’ data published by the Central Statistical Office. Based on the estimated model parameters, income elasticities of demand were calculated. It was found that the models described by the power function and the Törnquist function for basic goods were characterized by a better goodness of fit than the models using the exponential function with the inverse.

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