University of Kansas, Fall 2007
Philosophy 666: Rational Choice Theory
Ben Egglestoneggleston@ku.edu

Announcements

November 30, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Friday, November 30, 2007 2:21 PM
To: PHIL666 (37523) Fa07 - DL
Subject: social choice theory test recap

Hi everybody,

I have graded today's test, have posted an answer key on the course web site (http://web.ku.edu/~utile/courses/rct3), and have posted the scores on the online gradebook at the Blackboard site for our course. The scores posted there include a curve of 10 percentage points. I was impressed with the amount of work you did in 50 minutes, and the curve puts the class average for this test (85.2) higher than the averages for each of the previous two.

In case you are interested in how you did relative to the whole class, here are all of the scores, in descending order, with the median score marked with an asterisk:

105
99
93
92
88
87 *
85
80
76
67
65

I will return the tests in class on Monday, though you are welcome to pick yours up sooner if you'd like.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


November 28, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Wednesday, November 28, 2007 1:19 PM
To: PHIL666 (37523) Fa07 - DL
Subject: homework and class-participation scores

Hi everybody,

Since today was the last day for homework problems (problems for credit) to be turned in or class-participation points to be earned, I have computed the corresponding components of your grade and entered the scores into the online gradebook at the Blackboard site for the course.

I mentioned previously that I might compute your homework score as a weighted average of a score for correctness and a score for completeness, rather than basing it solely on correctness. I have decided to do that - specifically, to give completeness one third the weight of correctness. This raised everyone's homework score, and raised the class average by about 3.5 percentage points. (More numerical information is below.)

Your correctness score is the higher of the following two numbers:

1. the number of homework problems you got right divided by the number of homework problems (60)

2. the average of (a) the number of utility theory problems you got right divided by the number of utility theory problems (20), (b) the number of game theory problems you got right divided by the number of game theory problems (17), and (c) the number of social choice theory problems you got right divided by the number of social choice theory problems (23).

Your completeness score is the number of homework problems you turned in (regardless of correctness) divided by the number of homework problems (60).

In case you are interested in how you did relative to the whole class, here are all of the scores, in descending order, with the median score marked with an asterisk. (Their mean is 86.05.)

99.38, 99.38
98.18
91.25
87.48
86.02 *
85.13
80.95
76.21
74.63
67.95

So that's the story concerning your homework score. Things are simpler with your class-participation score. This score is just a function of the 1's and 0's that I wrote on your your index card (1 when I called on you and you answered in a way reflecting what I judged to be a good-faith effort to be prepared to answer correctly, 0 otherwise). Your score is the number of 1's on your card divided by the total number of 1's and 0's on your card.

Again, here are all of the scores, in descending order, with the median score marked with an asterisk. (Their mean is 85.76.)

100, 100, 100
94.12
91.67
88.24 *
83.33
76.47
75
71.43
63.16

See you Friday, for the test on social choice theory.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


October 24, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Wednesday, October 24, 2007 1:19 PM
To: PHIL666 (37523) Fa07 - DL
Subject: game theory test recap

Hi everybody,

I have graded today's test, have posted an answer key on the course web site (http://web.ku.edu/~utile/courses/rct3), and have posted the scores on the online gradebook at the Blackboard site for our course. The scores were not curved.

In case you are interested in how you did relative to the whole class, here are all of the scores, in descending order, with the median score marked with an asterisk:

100
95
91
91
90
85 *
79
78
75
70
70

The average of the scores is 84.0, more than 2 points higher than the average of the scores on the first test. I am pleased with this level of performance.

I will return the tests in class on Friday, though you are welcome to pick yours up sooner if you'd like.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


October 12, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Friday, October 12, 2007 9:07 AM
To: PHIL666 (37523) Fa07 - DL
Subject: syllabus update and test on game theory

Hi everybody,

I wanted to let you know that I just updated the syllabus (on the course web site, at http://web.ku.edu/~utile/courses/rct3). It now shows the plan we'll follow for the rest of the game-theory part of the course and the date of the test on game theory (Wednesday, October 24).

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


October 8, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Monday, October 08, 2007 1:35 PM
To: PHIL666 (37523) Fa07 - DL
Subject: correction to problem for credit #31

Hi everybody,

Nathan just pointed to me that in problem 31 (in the problems for credit), the specified strategy pair is mis-stated if it is to be an equilibrium pair (as it is claimed to be). The '5/9' and the '4/9' that appear in the specification of the column player's strategy need to be reversed. I apologize for this mix-up. I'll make a note of this correction on the web page containing the problems for credit.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


October 5, 2007:

Yesterday I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Thursday, October 04, 2007 10:30 PM
To: PHIL666 (37523) Fa07 - DL
Subject: RE: confused by problems 23 & 24

Hi everybody,

Usually I don't write substantive responses to e-mails inquiring about course material (finding that much less efficient than answering questions in real-time spoken conversations), but tonight I wrote a short substantive e-mail to one student in our class in response to some questions about two of the problems that are due tomorrow. It occurred to me that considerations of equity warrant sharing that same message with all of you, so I've appended it below, anonymized.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045

-----

From: Eggleston, Ben
Sent: Thu 10/4/2007 10:07 PM
To: [name]
Subject: RE: confused by problems 23 & 24

[name],

I'm not going to say much about this here - trying to explain these things by e-mail is too time consuming to do much of it - but I do want to mention that using dominance considerations to identify equilibrium outcomes will lead you astray. There can be equilibrium outcomes in dominated rows and columns, and not all outcomes in undominated rows and columns are equilibrium ones. So just ignore the concept of dominance and look at each outcome from the point of view of each player asking himself or herself whether he or she has any incentive to unilaterally deviate from a strategy leading (in connection with the other person's strategy) to that outcome.

This is probably all I'll have time to write about this before class - good luck with it.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


September 21, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Friday, September 21, 2007 12:20 PM
To: PHIL666 (37523) Fa07 - DL
Subject: utility theory test recap

Hi everybody,

I have graded today's test, have posted an answer key on the course web site (http://web.ku.edu/~utile/courses/rct3), and have posted the scores on the online gradebook at the Blackboard site for our course. The scores posted there include a curve of 8 percentage points.

In case you are interested in how you did relative to the whole class, here are all of the scores, in descending order, with the median score marked with an asterisk:

108
98
88
88
83
78 *
78
78
76
68
53

The average of the scores is 81.5.

I will return the tests in class on Monday, though you are welcome to pick yours up sooner if you'd like.

Best,

Ben

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


September 14, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Friday, September 14, 2007 1:45 PM
To: PHIL666 (37523) Fa07 - DL
Subject: next week in Rational Choice Theory

Hi everybody,

Three bits of news, none remarkable on its own but collectively maybe meriting this message:

1. You can plan on the test on utility theory being next Friday, September 21.

2. There won't be any more problems for credit before the test next Friday.

3. I've posted the last reading assignment on utility theory on Blackboard, and will hand out hard copies of it on Monday, for discussion of it on Wednesday.

Best wishes,

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


September 10, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Monday, September 10, 2007 5:49 PM
To: PHIL666 (37523) Fa07 - DL
Subject: problems for credit corresponding to section 14

Hi everybody,

As I mentioned in class today, section 14 might be a little harder than most of the previous ones. If, in response to that information (or for any other reason), you get started on it sooner and finish it in time to work on the problems for credit that are based on it, I wanted to let you know that those problems - which will be due this Friday - are now available on the course web site, at http://web.ku.edu/~utile/courses/rct3. Following my usual practice, I'll provide hard copies of them in class on Wednesday. I just wanted to let you know they were available in case you'd like to get started on them sooner than that.

Best wishes,

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045


July 10, 2007:

Today I sent the following e-mail message to all enrolled students:

From: Eggleston, Ben
Sent: Tuesday, July 10, 2007 3:08 PM
To: PHIL666 (37523) Fa07 - DL
Subject: Rational Choice Theory - early information

Dear students enrolled in my Fall 2007 section of Philosophy 666, Rational Choice Theory:

I know the fall semester is still a good ways off, but I wanted to go ahead and mention a few things that might be useful for you to know now.

First, as of now - but hopefully to be corrected soon - the course description posted at http://www.philosophy.ku.edu/Courses/Fall2007descriptions.shtml says the course will be at 2 p.m. on Mondays, Wednesdays, and Fridays. I'm not sure how that wrong time got stated there. As you probably know from officially signing up for the course, it will be at 10 a.m. I apologize for any confusion this may have caused.

Second, until recently, the course description posted at that same page erroneously said that the main book would be _Choice Theory_, by Michael Allingham. In fact, the main book will be _Choices_, by Michael Resnik. This was my mistake. I'm not sure how I made that mistake, since it has been my plan to use Resnik, and not Allingham, all along. If you have read any of Allingham, that's not wasted effort; there is a lot of overlap between the two books. But Resnik is the one we'll be using in the course, and I apologize for stating otherwise.

Third, a few of you have asked me about background reading you could do (aside from reading the main book itself), and I thought I would share my answer with all of you. I've been recommending _Game Theory: A Nontechnical Introduction_, by Morton Davis, with the following comments:

- There is some overlap between every chapter in the book and the material we'll be covering.

- Chapter 4 overlaps with the first third of our course, whereas the remaining chapters overlap with the second third of our course.

- Chapter 6 probably contains more material that we won't have time to cover than any other.

What all this adds up to is that I'd recommend the whole book as background for the first two thirds of our course, but with the proviso that we will not get to a lot of the more technical or intricate material.

So those are the things I wanted to tell you about. If you have any questions about anything before the start of the course, don't hesitate to ask. I'm looking forward to our class this fall.

Best wishes,

Ben Eggleston
eggleston@ku.edu
http://web.ku.edu/~utile
3070 Wescoe Hall
(785) 864-2332
mailing address:
Department of Philosophy
3090 Wescoe Hall
1445 Jayhawk Blvd.
University of Kansas
Lawrence, KS 66045