Microeconomics I 2022

***Announcements

The List of Excellent Students: Only graduate students are posted. Their scores are equivalent to A+ (there is no "A+" in our graduate school). Undergraduate students with high scores obtain A+ instead. There are altogether 8 students who obtain A+ or its equivalent. 3 of them are undergraduate students. (2022/09/05)

Exam starts! See the bottom of this page for the problem. (2022/08/01)

The typo of solution for PS5 (Problem 1(1)) is revised. Please check the blue part. (2022/7/29 Konan Shimizu) 

Solution for PS6 is up.(2022/7/27 Ayano Yago) 

New version of solution for PS5 is up.(2022/7/26 Konan Shimizu) 

Solution for PS5 is up. I have not added the figure for problem 3 and will add it soon. (2022/7/25 Konan Shimizu) 

Revised solution for PS3 (Problem 5 ) is up. Check the magenta part. (2022/7/25 Konan Shimizu) 

PS6 is up. (No due)  (2022/7/24 Ayano Yago) 

Exam of the year of 2021 has been up for your information. (2022/07/19)

I have returned answer sheets of HW4, but some of the e-mails couldn't be sent because of transmission error. I re-sent e-mail today, so please confirm it. If you have not received yet, please e-mail to me again. I'm sorry for inconvenience. (2022/07/19 Ayano Yago)

Q&A: "note" can be printed out in .pdf etc. (2022/07/18)

Recorded TA session #4 is up. Please check the link below.

https://drive.google.com/file/d/1ugfOHIWUpSLQHB0qw0WDfPqudEhSorec/view?usp=sharing

The solution to Problem set #4 is up. Average scores and other information will be added later.  (2022/07/13 Ayano Yago)

Today's class will be conducted solely via online. (2022/07/12)

PS5 is up. (No due) (2022/7/12 Konan Shimizu)

Lecture Note 05 for EUT is up. (2022/07/10)

Rules and Regulations for the final exam is up. (2022/07/10)

TA session will be held on Wednesday, 7/13 at 8:30 am via Zoom. ( I will record the session and upload later. ) I'll upload the solution of HW 4 beforehand. Please join us via link below.  (2022/07/04 Ayano Yago)

https://u-tokyo-ac-jp.zoom.us/j/89498954256

Problem set #4  is revised. Please check the latest version. (2022/06/28 Ayano Yago)

File "MicroI2022_04Fail.pdf" is up. Please see the bottom of this page. (2022/06/26)

Recorded TA session #3 is up. Please check the link below. 

https://u-tokyo-ac-jp.zoom.us/rec/share/fII4XHpF6yqV2HFW-ej9KcvMZL0ueYIQ8mnXsp5Ek-YM7cNr_djNeGvuz_IHHsNQ.BLF-ClAiYLcKGqNU?startTime=1655854074000

The deadline of Problem set #4  changes to 6/30. (2022/06/22 Ayano Yago)

The solution to Problem set #3 Q5  is  revised. Please check blue part (2022/6/19 Konan Shimizu)

Problem set #4  is revised. Please check the latest version. (2022/06/19, 06/22 Ayano Yago)

Problem set #4 is up. See the bottom of this page. (2022/06/17 Ayano Yago)

TA session will be held on Wednesday, 6/22 at 8:30am via Zoom. (I will record the session and upload later) Please join us via the link below. The content will be a review of PS3, but it is assumed that you have read the answers beforehand (i.e. not all the questions will be explained).(2022/6/16, Konan Shimizu)

https://u-tokyo-ac-jp.zoom.us/j/82023649309?pwd=NURGaXUxTkt5Y1RPdGI4czY0VWFhQT09

The solution to Problem set #2  is  revised. (2022/6/8 ,  6/13 Ayano Yago)

Recorded TA session #2 is up. Please check the link below. (2022/6/8 Ayano Yago)

https://drive.google.com/file/d/1PQbqJuzNNwq2HDJtbtcuE_UgH2Dw8Bwq/view?usp=sharing

The solution to Problem set #3 is up. Average scores and other information will be added later.  (2022/06/08 Konan Shimizu)

I added some additional explanations on PS3. Please check the latest version. (2022/06/02,06/05 Konan Shimizu)

The solution to Problem set #2 is up. Average scores and other information will be added later.  (2022/06/02 Ayano Yago)

TA session will be held on Wednesday, 6/8 at 8:30 am via Zoom. ( I will record the session and upload later. ) I'll upload the solution of HW2  beforehand. Please join us via link below.  (2022/05/28 Ayano Yago)

https://u-tokyo-ac-jp.zoom.us/j/81769781401 

Problem set #3 is up. See the bottom of this page. (2022/05/26 Konan Shimizu)

For Problem set #2 Q1(2)(b), I added additional explanations. Please check the latest version. (2022/05/22 Ayano Yago)

Lecture note 03 is up (2022/05/22)

For Problem set #2 Q1(2), I added additional explanations. Please check the latest version. (2022/05/22 Ayano Yago)

For Problem set #2 Q4(1), I added additional explanations. Please check the latest version.  (2022/05/21 Ayano Yago) 

Problem set #2 Q3(4) is revised again. Sorry for many corrections. Please check the latest version. (2022/05/21 Ayano Yago) 

Problem set #2 Q4(1) is revised. Please check the latest version. (2022/05/21 Ayano Yago)

Problem set #2 Q1(2) is revised. Please check the latest version.  (2022/05/20 Ayano Yago)

Problem set #2 is revised. (I added some assumptions for clarification.) Please check the latest version. (2022/05/19 Ayano Yago)

Recorded TA session #1 is up.  Please check the link below.(2022/5/18 Konan Shimizu)

https://u-tokyo-ac-jp.zoom.us/rec/share/daFgBMAmSnw0gmd7JyewlWBUiBAE7WvApdEYBFBLm4qPeTP0_-QZh0p1ZqBZYTow.tU1y2m_TziKLw_To

Problem set #2 is revised. Please check the latest version. (2022/05/18 Ayano Yago)

Problem set #2 is up. See the bottom of this page. (2022/05/17)

TA session will be held on Wednesday, 5/18 at 8:30am via Zoom. (I will record the session and upload later) Please join us via the link below. The content will be a review of PS1, but it is assumed that you have read the answers beforehand (i.e. not all the questions will be explained).(2022/5/12 Konan Shimizu)

https://u-tokyo-ac-jp.zoom.us/j/84630512525?pwd=Rc_D34BrnQUAcwUkFMSK9ejqIsFcXJ.1

The solution to Problem set 1 has been uploaded. Average scores and other information will be added later. Also, TA session will be held next week. Date and time will be announced later.(2022/5/11/ Konan Shimizu)

The due of PS1 is 23:59  May 10th. No late homework is accepted because I intend to upload the solution as soon as possible after the deadline.(2022/5/10/ Konan Shimizu)

We have uploaded a file summarizing all changes made to PS1 so far.(2022/5/8/Konan Shimzu)

In Q3(4) of PS1, please take (ND) to mean that $\nexists i \forall (\succsim_j)_j \forall k,l [k \succ_i l \Rightarrow k \succ l]$ (2022/5/7 Konan Shimizu)(2022/5/8 revised)

As some students pointed out, it seems natural as an axiomatic assumption to change (IIA) to the following (IIA)' in Q3(4) of PS1. Although (IIA)' is a weaker condition than (IIA) and the proof can be done using (IIA)', this change could complicate the solution with the submission deadline approaching, so (IIA) is not officially changed. However, using (IIA)' in the proof is of course acceptable.(2022/5/5 Konan Shimizu)

(IIA)':[The social preferences between  k and l (where k,l \in X) depend only on the individual preferences between k and l.] 

In Q3 of PS1,  please interpret  that $I_{kl}(\succsim_j) \subset I_{kl}(\succsim_j')$ in the MO definition  in lecture note does not include the case $I_{kl}(\succsim_j)=I_{kl}(\succsim_j')$. (i.e., it is a STRICT subset). However, even if you do NOT  interpret it that way and consider the case of = to be included in the definition, I will give full points if your answer is consistent. (2022/5/4)(TA:Konan Shimizu)

I added supplemental explanation for Q2 in problem set 1.  (2022/5/3)(TA:Konan Shimizu)

I added supplemental explanation for Q3(4) in problem set 1.  (2022/5/3)(TA:Konan Shimizu)

There is a correction to the question for Q2 in problem set 1. The corrected version is up (2022/4/25)(TA:Konan Shimizu)

Problem set #1 is up. See the bottom of this page. (2022/04/25)(TA:Konan Shimizu)

*** Syllabus (below)

S term

Tue. 8:30-10:15

Instructor

Akihiko Matsui

We study microeconomics. S-term covers the standard decision theory, price theory, and their applications.

Applications will be given as we proceed.

Prerequisites

Materials covered in Math Camp.

Students are strongly recommended to take Mathematics for Economists.

TA session

TBA

TA's: Ayano Yago, Konan Shimizu

Textbooks

Mas-Colell, Whinston, Green, "Microeconomic Theory" Oxford. (MWG)

Myerson, "Game Theory" Harvard.

Varian, "Microeconomic Analysis" Norton.

Contents

• 1. Decision Theory (Myerson will be used in this part.)

  2. Price Theory (MWG and Varian will be used in this part.)

     1. • Consumer theory

        • Producer theory

        • Equilibrium theory

        • Fundamental theorems of welfare economics

        • Market failure

  3. Market Theory with Indivisible Goods (References will be provided as we proceed.)

Grade

Grade is based on homework assignments (about 10%) and final exam (about 90%).

Homework assignments

will be posted on this page.

You may form a group of at most three (individual work is fine, too).

Submit one file per group with all the members' names written.

All the information is subject to change.