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## Main Question or Discussion Point

**1. Homework Statement**

6.3.b highlighted in attachment.

Have solved part a (which gives the approximant used in part b) and problem 3.8 (which gives the original function). 3.8 was definitely solved correctly. Part a could be wrong, but the solution seems OK.

a = acreage

y = yield

from 3.8 - p1,p2,c1,c2 are prices and consumption in periods 1 and 2.

**2. Homework Equations**

a = 0.5+0.5*Ey(f(ay)) where Ey is the expected price in terms of y and f(ay)=p1(s).

**3. The Attempt at a Solution**

%DEFINE FUNCTION FOR Part b

function [fval] = f63b(y)

fval = 0.5+0.5*Exp;

%5-POINT GAUSSIAN QUADRATURE

[y,w] = qnwlogn(20,0,0.01);

Exp = w'*p1;

fprintf('Exp'); disp(Exp)

a = broyden('f63b',s/2);

fprintf('a'); disp(a)

Gives value for expectation that is accurate, but then the following error:

??? Undefined function or variable 'Exp'.

Cannot find solution for a! Should we have 5 nodes or 20? When change to qnwlogn(5,0,0/01) get no value for Exp.

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