Referencesഀ ഀ ഀ ഀ Ahmad, I.A., Lin, P. E. (1984): “Fitting a multiple regression”, Journal ofഀ Statistics Planning and Inference, , vol. 2, pp. 163-176.ഀ ഀ ഀ Benedetti, J. K. (1977): “On the Nonparametric Estimates of Regressionഀ Function” Journal of the Royal Statistical Society, Series B, vol. B, vol 39, pp.ഀ 248-253.ഀ ഀ ഀ Bierns, H. J., Pott-Bitter, H. A. (1990): “Specification of Household Engel Curvesഀ by Nonparametric Regression” Econometric Reviews, vol.9, pp.123-184.ഀ ഀ Chu, C. K., Marron, J. S. (1991): “Choosing a Kernel Regression Estimator”ഀ Statistical Science, vol. 6, pp. 404-436.ഀ ഀ Devroye, L. P., Gyorfi, L. (1985): Nonparametric Density Estimation, New York,ഀ Wiley.ഀ ഀ Dodge, Y. (1986): “Some Difficulties Involving Nonparametric Estimation of aഀ Density Function” Journal of Official Statistics, vol. 2, pp. 193-202ഀ ഀ Epanechnikov (1969) Nonparametric estimation of a multidimensionalഀ probability density function Theory Probability Appl., vol. 14, pp. 153-158.ഀ ഀ Greene, W.H. (1993): Econometric Analysis, New Jersey: Prentice Hallഀ International Editions.ഀ ഀ Greblick, W., Krzyak (1980): “Asymptotic Properties of Kernel Estimates of aഀ Regression Function” Journal of Statistical Planning and Inference, vol. 4, pp. 81-ഀ 90.ഀ ഀ Hardle, W. (1990): Applied Nonparametric Regression, New Zork, Cambridgeഀ University Press.ഀ ഀ Hardle, W. (1991): Smoothing techniques with implementation in S, ser. Springerഀ Series in Statistics. New York: Springer-Verlagഀ ഀ Hardle, W., Oliver, L. (1994): Applied Nonparametric Methods, in Handbook ofഀ Econometrics vol. 4.ഀ ഀ Iordan, M., Regep, M., Chilian, M. N. (2001): "Household Consumption in theഀ Central and East - European Countries Aspiring to Joint the EU" Romanianഀ Journal of Economic, vol. 1-2.ഀ ഀ Maddala, G. S. (1992): Introduction to econometrics Maxwell MacMillanഀ International Editions.ഀ ഀ Pagan, A., Ullah, A. (1999):Nonparametric Econometrics, Cambridge,ഀ Cambridge University Press.ഀ ഀ Pindyck, R. S., Rubinfeld, D.L. (1991): Econometric Models and Economicഀ Forecasts, New York: McGraw – Hill International Edition.ഀ ഀ Scott, D. W. (1992): Multivariate Density Estimation: theory practice andഀ visualization, Wiley.ഀ ഀ Silverman, B.W. (1986): Denisty Estimation for Statistics and Data Analysisഀ London: Chapmand and Hall.ഀ ഀ Stanciu, Mariana. 2006. Metode de cercetare a modelelor de consum. Bucureşti:ഀ CIDEഀ ഀ Stanciu, Mariana. 2001. Structuri moderne ale consumului european. Bucureşti:ഀ Editura Genicodഀ