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Farm Income and Costs: Glossary

Inventory Change

The inventory components of crop and livestock output represent the value of the change in inventories as opposed to the change in the value of inventories. Under the concept of national income accounting, income is a measure of the net value of production occurring within the calendar year. Changes in the value of stocks produced in prior years as a consequence of price changes are not appropriate for inclusion as income. Thus, the quantity changes in inventories are computed and then valued at calendar-year weighted average market prices in order to avoid the inclusion of the effects of capital gains and losses on stocks of farmer-owned commodities held in inventory.

What is the significance of the value of change in inventories?

  • The inclusion of the value of the change in farmer-owned commodity inventories makes possible the calendar-year accounting for production. A positive change connotes new production that occurred within the year, remains in inventories at the end of the year, and is destined for sale after the end of the year. The addition of the increment to inventories credits the production to the year of occurrence. In contrast, a negative change is the result of a drawdown in beginning-year stocks and represents a sale of commodities produced in prior years. The inclusion of a negative inventory value serves to offset the effects of the sales of these quantities in cash receipts within that year. The offset is necessary to achieve calendar-year accounting because the commodities were previously accounted for in an earlier year as an addition to inventories.

Which farm income measures include the value of change in inventories?

  • Both value added and net farm income are value-of-production measures, which require adjustment for change in inventory in order to reflect current year's agricultural output. Net cash income estimates are independent of when production took place and, consequently, do not incorporate inventory change.

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Updated date: August 28, 2003