Barcodes and barcode scanners transformed the grocery industry in the 1970s. I use store-level data from the 1972, 1977, and 1982 Census of Retail Trade, matched to data on store scanner installations, to estimate scanners' effect on labor productivity. I find that scanners increased a store's...

Barcodes and barcode scanners transformed the grocery industry in the 1970s. I use store-level data from the 1972, 1977, and 1982 Census of Retail Trade, matched to data on store scanner installations, to estimate scanners’ effect on labor productivity. I find that early scanners increased a...

Retail chains and imports of consumer goods from developing countries have grown sharply over the past 25 years. Wal-Mart’s sales, which currently account for 15% of U.S. imports of consumer goods from China, grew 90-fold over this period, while U.S. imports from China increased 30-fold. We...

This paper documents and explains the recent rise of "big-box" general merchandisers. Data from the Census of Retail Trade for 1977-2007 show that general-merchandise chains grew much faster than specialist retail chains, and that general merchandisers that added the most stores also made the...

We use Hurricane Katrina's damage to the Mississippi coast in 2005 as a natural experiment to study business survival in the aftermath of a cost shock. We find that damaged establishments that returned to operation were more resilient than those that had never been damaged. This effect is...

Barcodes and barcode scanners transformed the grocery industry in the 1970s. I use store-level data from the 1972, 1977, and 1982 Census of Retail Trade, matched to data on store scanner installations, to estimate scanners' effect on labor productivity. I find that early scanners increased a...

Barcode scanners were introduced in the 1970s as a way to reduce labor costs in stores, particularly at checkout. This paper is the first to estimate their effect on productivity. I use store-level data from the 1972, 1977, and 1982 Census of Retail Trade, matched to data on store scanner...

We study the effect of increases in state minimum wages on the prices of several fast-food items using quarterly city-level data from 1993-2012, a period during much of which the federal minimum wage declined in real value while state-level legislation flourished. For two products, burgers and...

Barcode scanners, introduced in the early 1970s, were a foundational process innovation in the grocery supply chain. By 1984 scanners had been installed in 10% of food stores in the U.S. Difference-in-difference analysis of city-level price data shows that scanners reduced prices of groceries by...

We use hurricane Katrina's damage to the Mississippi coast in 2005 as a natural experiment to study business survival in the aftermath of a capital-destruction shock. We find very high exit rates for businesses that incurred physical damage, particularly for small firms and less-productive...