The enclosed set of files includes 1** In directory global: an f90 code that implements a global approximation via splines to the equilibrium functions. There are executables, output files that show the functions, and an Excel file that shows the values of the GEE and its derivatives. 2** In directory local: two subdirectories. One is called Polynomials and uses local-approximation polynomial solutions. This version of the code as well as the executable is of order 4. The local subdirectory uses linear (first-order) approximations only. 3** In directory output\paul: plots of the tax functions for all the cases we consider (labor, capital, and total income) for both the global and the local approximations and for the global only. In the main directory there are some Excel files that are used in the construction of the graphs. The code is written for Digital Fortran from COMPAQ and uses its IMSL packages. To run with another vendor, some adjustments will have to be made to the code. This will take very little time for any competent programmer.