Final answer:
The State Department uses economic factors, cost-of-living indices, and global rankings to determine per diem schedules.
Step-by-step explanation:
The State Department uses economic factors, cost-of-living indices, and global rankings to determine per diem schedules.
Economic factors include factors such as inflation rates, exchange rates, and economic stability. Cost-of-living indices help determine the average cost of goods and services in a specific location, while global rankings provide insights into the overall quality of life in different countries. Corporate preferences are not typically used.