D₁ S₁ S₂ inelastic supply elastic supply D₂ $8.00 $8.40 $9.00 6 Quantity Price (dollars) Demand up by 2: on elastic supply price is $8.40 (up $0.40); on inelastic supply price is $9.00 (up $1.00). Same demand increase, very different price jumps: the specialized-input good’s price rises 2½ times as much, because supply cannot easily expand.

Drag the gold demand curve to the right (or focus it and use the arrow keys). Watch the two price jumps pull apart.