Understand how rail freight-rate indexes are built and used to analyze farm costs.
This book describes the methods behind the final rail freight-rate index numbers for key farm commodities. It explains how the Bureau of Agricultural Economics constructs these annual measures and how researchers can use them to study changes in rail rates and their effects on farm products.
- Learn how the indexes are calculated as weighted averages of annual rates for representative traffic patterns
- See the base period used (1947–49) and how weights are derived to reflect shipment volumes
- Compare the Bureau of Agricultural Economics index series with the Interstate Commerce Commission indexes
- Understand time lags, seasonality, and the shift from crop-year to calendar-year reporting
Ideal for readers working in transportation research and agricultural economics, or anyone evaluating the utility of freight-rate tools for problem-specific studies.