This paper reviews the theory of the true cost of living index and its approximation through superlative index numbers, as well as the Vartia quantum theory of bias in index numbers as applied to substitution bias in consumer price indices. Estimated adjustments are proposed for the Argentine...

We study how within-store price variation changes with inflation, and whether households exploit it to attenuate the inflation burden. We use micro price data for food products sold by 91 large multi-channel retailers in ten countries between 2018 and 2024. Measuring unit prices within narrowly...

The results of purchasing power parity (PPP)-based comparisons of income across countries can be quite sensitive to the choice of index number formula. Tighter bounds on per capita income differentials can be constructed either by assuming homothetic preferences, or by estimating a demand...

The International Comparisons Program (ICP) run by the World Bank compares the purchasing power of currencies and real income across countries. Using a unique data set consisting of over 600,000 ICP price quotes drawn from nine countries in the Asia-Pacific region, we consider a number of ways...

Over the last three decades the supply of economic statistics has vastly improved. Unfortunately, statistics on regional price levels (sub-national purchasing power parities) have been exempt from this positive trend, even though they are indispensable for meaningful spatial comparisons of...

Our paper uses micro price data collected from Germany’s Consumer Price Index to compile a highly disaggregated regional price index for the 402 counties and cities of Germany. We introduce a multi-stage version of the weighted Country-Product- Dummy method. The unique quality of our price...

Over the last three decades the supply of economic statistics has vastly improved. Unfortunately, statistics on regional price levels (sub-national purchasing power parities) have been exempt from this positive trend, even though they are indispensable for meaningful spatial comparisons of...

The International Comparisons Program (ICP) run by the World Bank compares the purchasing power of currencies and real income across countries. Using a unique data set consisting of over 600,000 ICP price quotes drawn from nine countries in the Asia-Pacific region, we consider a number of ways...

The effect on the household consumption price index from possible sources of error in capturing digital products depends on the weight of the affected products. To calculate upper bounds for this effect, we apply weights based on the average structure of household consumption in OECD countries...