Vývoj podílu výdajů českých domácností za maso a masné výrobky a Engelovy závislosti ve spotřebě

Abstract

The article deals with the analysis of the shape of the Engel's curve in the field of the expenditures for meat and meat products. Within the analysis, the paper is especially focused on the initial growth phase of the Engel's curve. The CSO data of the average Czech household was used for the research. For the elimination of the price impacts in this income-expenditure analysis, the original CSO data on nominal level were transformed into the real level. The studied real shares were determined with respect to the total food expenditures and also with respect to the total households' incomes. The linear and the quadratic forms of the dynamic Engels' models were developed for the aims of the research. Besides the trend development, the periodical component was investigated. Regression analysis was fully confirmed the validity of the Engel's law in the field of the Czech-household expenditures for meat and meat products. Furthermore, the quadratic model form showed the existence of the initial growth phase of the examined Engel's curve. In case of the real share with respect to the total food expenditures by the model:rw1t* = (–1,0176E – 08) · (rmt*)2 + (2,8498E – 04) · rmt* + [(–1,7011E + 00) + (1,3970E – 03) · t],the size of the real household income is 14 003 CZK. For the second analysed share of the real expenditures with respect to the total households’ incomes, the real level of the income by the developed model:rw2t* = (–2,8844E – 09) · (rmt*)2 + (7,8205E – 05) · rmt* + [(–4,6323E + 01) + (3,1095E – 04) · t]the value was 13 557 CZK.