Does CPI Approximate Cost-of-Living?: Evidence from the Czech Republic
AbstractAn original method based on an n-markets simultaneous partial equilibrium model is designed to evaluate the second order bias in the Consumer Price Index's (CPI) approximation of the Cost-of-Living (COL) and to test the statistical significance of its mean value over a variety of horizons. In the empirical application of the model I consider nine goods markets that correspond to the first strata level breakdown of the CPI in the Czech Republic for the period 1994-2000. Having evaluated the substitution bias, i.e., the difference between the growth rate of the CPI and the growth rate of the COL, I find that on a yearly basis it ranges from -0.83 to 0.51 p.p. In addition, I find that, on average, the bias statistically vanishes on the time horizon of five quarters. Different levels of inflation such as moderate (10%) and lower (2%) characterized the sample period and therefore I conclude that the derived result is robust up to moderate inflation.
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Bibliographic InfoPaper provided by The Center for Economic Research and Graduate Education - Economic Institute, Prague in its series CERGE-EI Working Papers with number wp214.
Date of creation: Jul 2003
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second order bias; partial equilibrium; CPI bias;
Find related papers by JEL classification:
- C82 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Methodology for Collecting, Estimating, and Organizing Macroeconomic Data; Data Access
- E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
- P24 - Economic Systems - - Socialist Systems and Transition Economies - - - National Income, Product, and Expenditure; Money; Inflation
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