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הי, איך אנחנו נדרשים להגיש את הפרויקט? אימייל?

הגשת הפרויקט by Nadav BarNadav Bar, 11 Aug 2016 10:07

מיכל מבקשת שמי שמעוניין להגיע לשעת הקבלה שלה ביום ראשון הקרוב (5/6) ישלח לה מייל לפני כן, על מנת לחלק את הזמנים בין הסטודנטים באופן הוגן ויעיל.

(אותו מקום כמו התרגיל הראשון)

תרגיל 2 הוחזר by IsraelaIsraela, 29 May 2016 10:05
final projects
IsraelaIsraela 20 May 2016 12:08
in discussion News / Spring 2016 News » final projects

Hi all,

As Michal said in class, you should submit a proposal for your intended project topic. The proposal should include a list of articles you plan to look at, a short description of the topic (few paragraphs), and a possible research question(s).

It is highly recommended to try to have a research project.
Thus, in general, reseach projects will gain a higher grade.

Projects should be submitted in groups of 2-3 students.

final projects by IsraelaIsraela, 20 May 2016 12:08

why? it shouldn't be a problem to analyze the other case

Re: ex2 problem5 by IsraelaIsraela, 17 May 2016 19:30

I approve, thanks Tzahi

Re: ex2 problem 4 by IsraelaIsraela, 17 May 2016 19:12

yes, thanks Itay

Re: Questions about ex 2 by IsraelaIsraela, 17 May 2016 19:11

I'm not Israela BUT:
1. Yes. (Notice he lies in the valuation not in the allocation)
2. It's a second price auction (winner = highest bidder, payment for winner = second highest bid).

Re: ex2 problem 4 by TzahiTTzahiT, 17 May 2016 18:32

Israela - can you please confirm?

Re: Questions about ex 2 by nimrodranimrodra, 17 May 2016 15:55

1. yes
2. yes

Re: Questions about ex 2 by ItayPkItayPk, 17 May 2016 07:35

Can we assume that n>k?
Thanks

ex2 problem5 by msh5746msh5746, 17 May 2016 05:53

1. In the example we are required to give, in the case the bidder is cheating (submit multiple bids) he can lie as much as he wants (ant give some allocation not what it is really worth for him). Right?
Also, the utility in this case is calculated as v-p, when v is the value that the (chosen) allocation really worth for him, right?
2. What is the definition of Vickrey auction?
Thanks

ex2 problem 4 by msh5746msh5746, 16 May 2016 22:27

1. In question 1, can we assume the bidders have different private valuations?
2. In question 3, is "surplus" the same as social welfare?

Questions about ex 2 by nimrodranimrodra, 16 May 2016 18:09

אני מצטערת אם לא הייתי ברורה.
העניין הוא שיש לך שאלות והערות רבות על כל הרצאה. אם הפסדת כמה הרצאות, כנראה שכדאי להשתמש בספר על מנת להשלים את החומר, בנוסף לסיכומים (או במקום). שימוש במקור נוסף יפתור את הבעיה של חוסר דיוקים ושגיאות בסיכומים.
אין לי יכולת לענות על כל כך הרבה שאלות על כל הרצאה במסגרת הפורום. הפורום נועד בעיקר להבהרות לגבי תרגילי בית (אני רק בודקת תרגילים, ולא מתרגלת).
אם יש שאלה ספציפית אני משתדלת לעזור, אבל בכמות הזאת זה מעבר לscope של העבודה שלי.

Re: questions about lecture 3 by IsraelaIsraela, 16 May 2016 16:57

מכיון שחלק מהשאלות היו האם יש טעות במקומות מסוימים, משמע אני מבין שתתכן אפשרות שישנה טעות בטקסט, כך שאיני מבין למה צריך להזהיר אותי מכך שהאפשרות ישנה (פעמיים).
בתגובה לשאלות על הרצאה 1 ענית לי שהשאלות לא היו מובנות. כך שניתן היה להבין, שפירוט וניסוח מחדש של השאלות ייענה בתשובות. אם מראש לא היתה לך כוונה לענות לי על השאלות, אולי היה כדאי לצין זאת, שלא אטרח ואוסיף עוד שאלות…
ולגופו של עניין, פספסתי חלק מן ההרצאות שלא מבחירה, ונראה לי שהדרך הכי יעילה להשלים את החומר היא דרך סיכומי ההרצאות. כך שאיני מבין למה אי אפשר לקבל מענה לשאלותי, מה גם שבחלק מהשאלות התשובה היא כמה מילים בלבד.
אשמח לתשובה לפחות לפוסט זה.

Re: questions about lecture 3 by msh5746msh5746, 15 May 2016 15:27

As I previously said, the scribe notes might contain mistakes, and should be used carefully.
You can refer to other sources, as Nisan's book (there is a link to a online version at the website).

Re: questions about lecture 3 by IsraelaIsraela, 15 May 2016 13:36
Re: Definition of VCG by IsraelaIsraela, 15 May 2016 13:32

my mistake, it is enough to prove for Clarke pivot

Re: Question 5 part b by IsraelaIsraela, 15 May 2016 13:22

1. Definition 1 page 1 - It says (at the third line of the definition) that the equality holds for each player. Isn't that redundant, (and therefore wrong)? It seems that the equality holds only for the deviating player. (And the fact that each player can be the deviating player was already mentioned in the second line).
2. Equations (1) and (2) in page 2 - shouldn't the sum on the last operand be over all edges which are in P_i\P_i^? And therefore, shouldn't the text in the paragraph between the equations be "the last element of the second operand is canceled" (instead of the current version that says "not canceled").
3. What is the calculation that leads to the fact that the example for CE on page 5 is indeed CE?
4. I want to make sure I understand why the CCE on page 5 is CCE: In half of the profiles (in the support) player 1 shares his edge with another player, and on the other half he doesn't. Meaning, his cost expectation is 1/2*2+1/2*1=1.5 .
If player 1 deviates to the fixed strategy 0 then his cost expectation would be 1/72[6*2+6*3+3*1+9*2+3*1+9*2+36*1]=1.5 .
Is this calculation correct?
5. Inequality (4) in page 6 - Shouldn't it be equality? I mean, isn't the cost of a profile defined as the sum of the costs of all players?
6. Cost sharing games - what is the meaning of v in profile p? (the last line of the first paragraph in page 8)
7. In the potential definition on page 8 - shouldn't the last sum in this equation go from i=1 to i=p_e?
8. Lemma 16 page 10 - the lemma bounds (lower and upper bound) the potential function. Is this bound holds for all potential functions of fair cost-sharing games? Or just the one defined in page 8? And in general, is there only one potential function for each game ? (in case it exists)
9. the last equation on page 10 - Isn't the demand that outer sum goes over all edges in p^i redundant? If we want to run over all edges that were chosen (at least by one player) the demand p_e>=1 is enough. Also, it's confusing in the middle part of the equation when i has a slightly different meaning.

Thanks a lot

questions about lecture 3 by msh5746msh5746, 15 May 2016 12:26
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