E N D
1. Approximate quadratic-linear optimization problem Based on
Pierpaolo Benigno and Michael Woodford
2. The Quadratic Approximation to the Utility Function Consider the problem
3. The first-order condition
4. The second-order approximation to the utility function
5. The second-order approximation to the constraint
6. Substitute the second-order approximation to the constraint into the linear term of the second-order approximation to the utility function, using the FOC, yields a quadratic objective function