The American Institute of Architects monthly Architecture Billings Index came in at 47.5 in December, a 0.9-point rise from November's score of 46.6. The ABI is a leading economic indicator of construction activity in the U.S. and reflects a nine- to 12-month lead time between architecture billings and construction spending nationally, regionally, and by project type. A score above 50 represents an increase in billings from the previous month, while a score below 50 represents a contraction.

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