Short Answer

Interpreting the Supply Curve Shift from a Supplier Tax

When a per-unit tax is imposed on suppliers, some describe the effect as a 'leftward shift' of the supply curve, while others describe it as an 'upward shift'. Although both describe a decrease in supply, explain why the 'upward shift' is a more precise description of the direct impact on the suppliers' behavior.

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Updated 2025-08-10

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