Total Differential Economics: Small Model Changes
Total differential economics explains how small changes in several variables combine through marginal effects to change an economic model’s outcome.
Comparative Statics
Implicit Function Theorem Economics: Comparative Statics
Implicit function theorem economics explains how equilibrium comparative statics can be derived locally without solving models explicitly.
Jacobian Matrix Economics: Comparative Statics and Stability
Jacobian matrix economics explains how first-derivative matrices support comparative statics, local solvability, and stability analysis in economic systems.
Envelope Theorem: A Shortcut for Optimisation Problems
The Envelope Theorem simplifies comparative statics: the total derivative of a maximised objective equals the partial derivative at the optimum,...