Final answer:
An increase in transportation costs leads to a decrease in ROA, as higher costs cut into profits. Conversely, a decrease in transportation costs can improve ROA by enabling companies to expand services and increase profitability without raising prices.
Step-by-step explanation:
The direct effect of an increase in transportation cost is to decrease Return on Assets (ROA). An increase in transportation expenses, such as shipping finished goods over congested street networks or jammed freeways, elevates costs and diminishes profits. In contrast, locations near uncrowded freeways that facilitate access to materials and workers, or close to rail or water transport options, can enhance cost-effectiveness.
To understand the impact on ROA, consider a messenger company whose significant expenditure is on gasoline. If gasoline prices drop, the company's costs decrease, which in turn could boost profits and expand the range of services provided without raising prices. The correlation between transportation costs and ROA is therefore inverse; as the former declines, the latter generally improves, assuming all other factors remain consistent.