The Billion Prices Project: Using Online Prices for Inflation Measurement and Research

Alberto  Cavallo; Roberto  Rigobon

Article | Journal of Economic Perspectives | Spring 2016

The Billion Prices Project: Using Online Prices for Inflation Measurement and Research

by Alberto Cavallo and Roberto Rigobon

Abstract

New data-gathering techniques, often referred to as “Big Data” have the potential to improve statistics and empirical research in economics. In this paper we describe our work with online data at the Billion Prices Project at MIT and discuss key lessons for both inflation measurement and some fundamental research questions in macro and international economics. In particular, we show how online prices can be used to construct daily price indexes in multiple countries and to avoid measurement biases that distort evidence of price stickiness and international relative prices. We emphasize how Big Data technologies are providing macro and international economists with opportunities to stop treating the data as “given” and to get directly involved with data collection.

Keywords: billion prices project; online scraped data; online price index; Economics; Research; Price;

Format: Print

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Citation:

Cavallo, Alberto, and Roberto Rigobon. "The Billion Prices Project: Using Online Prices for Inflation Measurement and Research." Journal of Economic Perspectives 30, no. 2 (Spring 2016): 151–178.

Supplemental Information

Data Files

This dataset contains the data files needed to generate the graphs in the paper.
Appendix
Replication Files

Contains the do files (scripts) and folder structure needed to replicate the graphs in the paper. The data files downloaded from the Harvard Dataverse need to be saved in the "RAWDATA" folder.

Case | HBS Case Collection | May 2020 (Revised June 2020)

The Coronavirus (COVID-19) Pandemic and the Global Economy (A)

Alberto Cavallo and Christian Godwin

In April 2020, the world struggled to contain the exponential escalation of the coronavirus (COVID-19) pandemic. Dozens of countries had imposed restrictions on travel, work, and social gatherings. A large share of the global population was under lockdowns and unprecedented supply and demand disruptions crippled the economy. In response, central banks announced massive lending programs to avoid a financial meltdown, and governments were launching unprecedented fiscal packages designed to contain the collapse. In a matter of weeks, the pandemic turned into one of the worst global economic crises since the Great Depression. As governments struggled to make policy decisions, uncertainty and tensions were rising. How to balance the public health and economic concerns? What would be the economic and political consequences of the policy response? Was this the end of globalization, or the beginning of a new era of international cooperation? The only certainty was that some of the hardest choices still lay ahead.

Keywords: Demand and Consumers; Supply and Industry; Finance; Central Banking; Financial Markets; International Finance; Globalization; Government and Politics; Health Pandemics; Decision Making; Macroeconomics; Employment; Crisis Management; Supply Chain; Risk and Uncertainty; Air Transportation Industry; Banking Industry; Consumer Products Industry; Employment Industry; Financial Services Industry; Food and Beverage Industry; Health Industry; Medical Devices and Supplies Industry; Pharmaceutical Industry; Public Administration Industry; Retail Industry; Service Industry; Shipping Industry; Tourism Industry; Travel Industry; Asia; China; Europe; Latin America; Africa; United States;

Citation:

Cavallo, Alberto, and Christian Godwin. "The Coronavirus (COVID-19) Pandemic and the Global Economy (A)." Harvard Business School Case 720-031, May 2020. (Revised June 2020.) View Details

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The Covid-19 Pandemic has led to changes in consumer expenditure patterns that can introduce significant bias in the measurement of CPI inflation. I use data collected from credit and debit transactions in the US to update the official basket weights. I find that the Covid inflation rate is higher for both headline and core CPIs, particularly for low-income households. I find similar results in 12 of 17 additional countries. The difference is growing over time as consumers spend relatively more on food and categories with rising inflation, and relatively less on transportation and categories experiencing significant deflation.

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The Billion Prices Project: Using Online Prices for Inflation Measurement and Research

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