Estimation Methods of inflation effects on the income
(expenditure) distribution can be divided into three groups:
parametric, semi-parametricand non-parametric. In this paper the
inflation effects on the expenditure distribution inequality in Iran
during 1971-2001is estimatednon-parametrically.In order to do so,
the ConsumerPrice Index is divided into 5 food groups of bread &
rice, meats,dairy products,fruit&vegetablesandother food products,
and 7 non-food groups of clothing & shoes, hosing & energy,
furniture, transportations & communications, heath and cares,
educations& hobbiesand othernon-foodproducts.Then, expenditure
distribution in terms of current prices, corresponding to the
combinationof quantity consumptionbasket and accordingto CPI in
the baseyear is transformedintothe constantexpendituredistribution.
After that, comparingthe sharesof the twentiesandthe corresponding
inequality indices (Gini coefficients) of the current (pre inflation
removal) and fix (post inflation removal) expenditure distributions,
the extent and direction of the inequalitychanges is estimated. The
results indicatedthat the relativeprice changesin the urbanareas have
had an egalitarianeffect until 1980,but the trend has changed since.
The relativeprice changesin the rural areas have had cyclicaleffects
on the fixed inequalitysince 1982.