Another Role for Construction Cranes: Economic Indicator
Companies, agencies, institutions, etc
People
Groups
Physical locations
Places
Locations
Events
Positivity 50%
Negativity 50%
SOURCE:
https://www.nytimes.com/2019/03/19/business/economy/what-is-crane-index.html
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Summary
To help its clients assess hiring trends, a construction consulting firm created a crane index, which also provides a snapshot of the economy.
As said here by By C. J. HUGHES