A per-unit tax imposed on suppliers will shift the supply curve up by the amount of the tax.
Illustrate the deadweight loss from the tax
"P_0" and "Q_0" are the equilibrium price and quantity before the imposition of tax, respectively, as seen in the graph above. With the tax, the supply curve shifts from Supply 0Supply 0 to Supply 1.Supply 1 by the tax amount.
Because of the tax, businesses would want to supply less.
The buyer's price would increase from "P_0" to "P_1" and the seller would receive a lower price for the good from "P_0" to "P_2" . Due to this tax, producers supply less from "Q_0" to "Q_1" .
The blue traingle represents dead weight reduction, which may be calculated as:
Dead weight loss"=\\frac{1}{2}\\times(P_2-P_1)\\times(Q_0-Q_1)"
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