The Hamilton method for estimating CPI bias is simple, intuitive, and has been widely adopted. We show that the method confiates CPI bias with variation in cost-of-living across income levels. Assuming a single price index across the income distribution is inconsistent with the downward sloping...

This paper computes and compares alternative quality-adjusted price indexes for new cars in Spain in the period 1990 - 2000. The proposed hedonic approach simultaneously controls for time-invariant unobserved product effects and age effects, that can be interpreted as a proxy for time-variant...

This paper finds that the shift from buying music as a physical product towards subscribing to music services implies a decrease of 85 percent in the price paid per song. We estimate that in 2019 the global quality adjusted value from streamed music was $76 billion compared to current revenues...