Roy's Identity — Interactive 3D Animation

Roy's Identity · x_i = −(∂v/∂p_i) / (∂v/∂m)

unseel.com · two derivatives, one division, full demand

Px $4
Stage —

Beat —

Indirect utility V(p, m)
∂V/∂p · negative
∂V/∂m · positive
Marshallian x_i recovered