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Using Engel Curves To Estimate Bias In The Canadian Cpi As A Cost Of Living Index

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  • Beatty, Timothy K.M.
  • Larsen, Erling Roed

Abstract

. Semiparametric Engel curves are used to infer bias in the Canadian CPI as a Cost of Living Index. The budget share of food has long been used as an indicator of welfare. We compare households with the same levels of CPI deflated total expenditure over the period 1978–2000. Differences in the expenditure share of food are attributed to the CPI failing to capture changes in costs of living. We employ a novel econometric approach using a single index penalized linear spline model. Over the period, we find that the CPI overstated changes in the cost of living between 1.33 and 1.86% for the four household types considered. JEL classification: D1, C1 L’utilisation des courbes d’Engel pour évaluer la distorsion de l’IPC en tant qu’indice du coût de la vie. On utilise les courbes semi‐paramétriques d’Engel pour identifier le biais de l’IPC comme indice du coût de la vie au Canada. La part du budget qui va à la nourriture a depuis longtemps été utilisée comme un indicateur de bien‐être. On compare des ménages qui ont les mêmes niveaux de dépenses totales (dégonflées par l’IPC) pour la période de 1978 à 2000. Les différences dans la portion des dépenses qui va à la nourriture sont attribuées au fait que l’IPC ne saisit pas les changements dans les coûts de la vie. On emploie une approche économétrique inédite utilisant une fonction spline linéaire avec pénalités pour produire un seul indice. Sur l’étendue de la période, on découvre que l’IPC surévalue les changements dans le coût de la vie de 1.33 à 1.86 pour cent pour les quatre types de ménages étudiés.
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Suggested Citation

  • Beatty, Timothy K.M. & Larsen, Erling Roed, 2004. "Using Engel Curves To Estimate Bias In The Canadian Cpi As A Cost Of Living Index," Working Papers 15836, University of British Columbia, Food and Resource Economics.
  • Handle: RePEc:ags:ubcwps:15836
    DOI: 10.22004/ag.econ.15836
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    JEL classification:

    • D1 - Microeconomics - - Household Behavior
    • C1 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General

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