The document discusses indirect taxes and their impact on price and quantity. It shows graphs illustrating how a tax affects the supply curve. If demand is elastic (coefficient >1), suppliers bear most of the tax burden, while if demand is inelastic (<1), consumers bear most. A tax on an inelastic good or one with perfectly elastic supply results in consumers paying the full tax. An ad valorem tax causes a pivotal shift in supply as the tax percentage applies to the unit cost. Examples given are VAT and insurance premium tax.