Building an alliance to map global supply networks.

New firm-level data can inform policy-making.

How production networks amplify economic growth.

Technological improvement is the most important cause of long-term economic growth. In standard growth models, technology is treated in the aggregate, but an economy can also be viewed as a network in which producers buy goods, convert them to new goods, and sell the production to households or other producers. We develop predictions for how this network amplifies the effects of technological improvements as they propagate along chains of production, showing that longer production chains for an industry bias it toward faster price reduction and that longer production chains for a country bias it toward faster growth.

Tracking the COVID-19 crisis with high-resolution transaction data.

Payments systems generate vast amounts of naturally occurring transaction data rarely used for constructing official statistics. We consider billions of transactions from card data from a large bank, Banco Bilbao Vizcaya Argentaria, as an alternative source of information for measuring consumption. We show, via validation against official consumption measures, that transaction data complements national accounts and consumption surveys.

Statistical analysis of teeth autotransplantation in Portugal's region of Chaves.

Aim: The aim of this study was to evaluate the success rate of 33 transplanted teeth in a northern population of Portugal.

Methods: The mean follow-up period was 7 years, ranging from 6 months to 20 years.

Results: Six teeth (18%) were rated as unsuccessful, 52% of the donor teeth were transplanted to receptor alveolus after immediate exodontia and 24% were transplanted to receptor alveolus surgically prepared.