13.1 The Mathematics of Regular Perturbation Methods 13.2 Comparative Statics 13.3 Perturbing an IVP 13.4 Perturbing a BVP: Comparative Dynamics 13.5 Continuous-Time, Deterministic Control with One State and One Control 13.6 Stochastic Control 13.7 Perturbing Discrete-Time Systems 13.8 Perturbing Jump Process Control Problems 13.9 Global Quality Test of Asymptotic Approximations 13.10 Exercises