Corrections to

 

Numerical Methods in Economics

 

by Kenneth L. Judd

 

Chapter 1: Introduction

 

page 8, line 17:

now: other questions are not.;

change to: other questions can not.

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page 15, line 1:

now: that is was.;

change to: that it was .

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page 15, line 6.

now: " unclear ;

should be: " nuclear

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page 15, line 13

now: closed-from ;

should be: closed form

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page 17, line -7:

now: " algorithms, which ..;

change to: algorithms, show which.

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page 18, line -8.

now: ranging form ;

change to: ranging from .

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page 20, line 6.

now: there reasons ;

change to: these reasons .

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page 21, line 9:

now: the Hessian ;

change to: The Hessian .

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page 21, line 12:

now: scaler ;

change to: scalar .

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page 23, lines 2 and 3:

now: Currently the mathematical expression $\det (A-\lambda I)$ is split between lines 2 and 3.

Change to: It should not be split.

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Chapter 2: Elementary Concepts in Numerical Analysis

 

page 33, line -15:

now: programmer time than ;

change to: programmer time rather than .

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page 36, line 6:

now: MATH;

change to: MATH

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page 36, line 12:

now: MATH;

change to: MATH

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Chapter 3: Linear Equations and Iterative Methods

 

page 58, line 10:

now: describes ;

change to: describe .

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page 60, line 20:

now: matrix $C$ formed by;

change to: matrix $C_{ij}$ formed by;

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Page 63ff: The details of sparse matrices in Section 3.4 contains several typos. Figure 3.1 contains the basic idea. I believe that the following changes fix the problems. More important, convenient sparse matrix software is more common today than when the book was written. I recommend that you use that software instead of writing your own sparse matrix code.

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Chapter 4: Optimization

 

page 114, line 11:

now: initial hessian guess $H^{0}\ '\ $;

change to: initial Hessian guess $H^{0}=I\ '\ $

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Chapter 5: Nonlinear Equations

 

page 182, line -5:

now: must full rank ,

change to: must have full rank

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page 160, line --8:

now: $n(n-1)/2$ ;

change to: $n!$

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page 191, footnote 4:

now: (5.11.7) ;

change to: (5.10.7)

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Chapter 6: Approximation Methods

 

page 198, last column

now: six occurences of 0.9457

change to: correct values of $x^{1/4}$

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page 214, line -3

now: Also next to ... approximation.

change to: Nothing; delete sentence since the columns are missing from Table 6.4.

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page 232, line 11

now: the interval $[a,b]$

change to: the interval $(t_{1},t_{2})$

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page 234, equation below (6.11.6)

now: MATH

change to: (drop minus sign in $s_{1}$ definition)MATH

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Chapter 7: Numerical Integration and Differentiation

 

page 283, line 4:

now: errors over ;

change to: errors of the polynomial approximations over

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Chapter 8: Monte Carlo and Simulation Methods

 

page 295, line -9:

now: a $X$ ;

change to: a random variable $X$

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Chapter 9: Quasi-Monte Carlo Methods

 

page 331, line 5:

now: tables 9.1. ;

change to: table 9.1.

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Chapter 10: Finite Difference Methods for Functional Equations

 

page 353, line -3:

now: replace by

change to: replaced by

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page 365, line -11:

now: ldifferential ;

change to: differential .

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page 366, problem 6, below s.t. line:

now: where $\pi (p,Q)$;

change to: where $\rho =.04$ and $\pi (q,Q)$

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Chapter 11: Projection Methods for Functional Equations

 

page 371, line 2:

now: (1.1). To ;

change to: (11.1.1). To .

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page 374, line -1 (last line of text):

now: table 11.2 ;

change to: Table 11.2 .

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page 382, line 4:

now: Chapter 6 ;

change to: chapter 6 .

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page 389, line 11:

now: kind of BVP's ;

change to: kinds of BVP's .

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Chapter 12: Numerical Dynamic Programming

 

page 425, line -7:

now: columns. labeled ;

change to: columns, labeled .

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page 426, heading of Table 12.1:

now: (12.52) ;

change to: (12.5.2)

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page 439, line -9:

now: These methods eliminates ;

change to: These methods eliminate .

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page 441, three lines above equation (12.10.3):

now: in table 6.2 ;

change to: in table 12.2

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page 443, Exercise 3, line 6

now: gaussian ;

change to: Gaussian .

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Chapter 13: Regular Perturbations of Simple Systems

page 459, line -6:

now: evaluate (4.9) ;

change to: evaluate (13.4.9) .

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page 466, 3rd equation (13.5.12):

now: =0 ;

change to: =0.

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page 468, line 5:

now: (13.5.7) ;

change to: (13.5.17) .

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page 477, line -6

now: this is example ;

change to: this is an example .

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Chapter 14: Regular Perturbations of Multidimensional Systems

 

page 488, line 9:

now: (6.11.3) ;

change to: (1.6.2)

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page 488, line 9:

now: the ;

change to: the .

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page 496, line 1:

now: one dollar ;

change to: one-dollar .

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page 502, line -1

now: version of (14.4.6) ;

change to: version of (14.4.6) is .

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Chapter 15: Advanced Asymptotic Methods

 

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Chapter 16: Solution Methods for Perfect Foresight Models

 

page 551, line -5:

now sufficient conditons ;

change to: sufficient conditions .

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Chapter 17: Rational Expectations Models

 

page 587, 2nd equation (17.4.12):

now: ))]}. ;

change to: )}.

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page 587, 3rd equation (17.4.13):

now: ))]}. ;

change to: )}.

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page 598, line -12

now: jacobian ;

change to: Jacobian .

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page 601, line 12:

now: faster then ;

change to: faster than .

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page 601, footnote 6, line 1:

now: Den Haan ;

change to: den Haan .

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page 602, line 16:

now: the the ;

change to: the .

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page 604, line 6:

now: Gaspar and Judd (1997) evaluates ;

change to: Gaspar and Judd (1997) evaluate .

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page 604, line 10:

now: do not present ;

change to: does not present .

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References

 

page 621

now: Tierney, L., et. al, 1986.

change to: Tierney, L., R. E. Kass, and J. B. Kadane. 1989. Fully exponential

Laplace approximations to expectations and variances of nonpositive

functions. "Journal of the American Statistical Association" 84:710-716.