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May 14, 2020 |
With the current fast-changing developments, policy makers need to know what is happening to the economy in real time, but they often must settle for data telling them what happened many weeks ago. And international trade, which links countries through a complex web of supply chains, is an area where timely information is especially valuable from a global perspective.
Most trade takes place by sea, and—for navigational safety purposes—virtually all cargo ships report their position, speed, and other...