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Old 02-04-2009, 06:59 PM   #21
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Originally Posted by achtung_girl View Post
really? You have never had to do with that? interesting...oh I just saw DAS/DAD also has to do with rational/adaptive expectations and demand/supply shocks...anyway.
Do you know what I mean with endogenous/exog. variables in Mundel-Fleming Model? How do I know which variables are exogenous ( =0)?

I read Burda/Wypolsz, Mankiw and Gärtner at the same time and I still don't get it...
A lot of the theoretical stuff we do more in passing. Can't remember having talked about those models.
DAS/DAD sounds interesting, and I guess I will read up on that.

Exactly how to determine the endogeneous and exogeneous variables I can't tell. But since endogeneous is always something that "comes from you", i.e. you can influence it while the exogeneous stuff is something that you don't have under your control I guess in the model the IS curve is endogeneous while the LM curve would be exogeneous as should be the ZZ curve.
But that's just my guessing.
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Old 02-04-2009, 10:58 PM   #22
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PROBLEM 2. Hi youtooellen. Hope this helps.
x=(y-1)/2 --> slope intercept form --> y=2x+1 so based on y=mx+b where m=slope and b=y-intercept, we know slope(m)=2. Parallel lines have the same slope, so second line slope (m)=2.

To find y-intercept(b) of second line, use x-intercept=5 and m=2
x-intercept is solved by setting y=0, 0=mx+b you are given x=5 and you know m=2 from first part so solve for b b=-(mx) b=-(2x5) b=-10
Plug m=2 and b=-10 into slope intercept form y=mx+b --> y=2x-10.

Oops. I didn't see that this was from LAST night. NEVERMIND, but I have PROBLEMS 3 and 4 if you still want them. Let me know. Good Luck.
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Old 02-05-2009, 09:35 AM   #23
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^ ah! thank you so much. see, i forgot everything about slope and whatnot. the formulas to get m and all that jazz.
perpendicular to an equation means that the slope has to be opposite reciprocal, right? i don't know why but the whole y-y1=m(x-x1) is irritating. i can't use it properly when i'm given an x-intercept to begin with.

i just solve from y=mx+b and plug in the (x,0) and (0,y) points to find b.

i have a math exam today....... i'm not sure if i'll do well or terrible. i think i learned the material pretty damn fast so i'm thinking i'll do well. or at the very least pass the exam.

does anyone know what the term "alternative odds" means? my professor wrote that on our homework assignments.... #1-111, and i thought that meant just the odd numbers... but that's taking so fucking long. i'm guessing alternative odds has to mean something else. any chance someone can clarify my idiocy?
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Old 02-05-2009, 09:38 AM   #24
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Just looking at this makes my head hurt.
Same.
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Old 02-05-2009, 11:30 AM   #25
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Originally Posted by Vincent Vega View Post
A lot of the theoretical stuff we do more in passing. Can't remember having talked about those models.
DAS/DAD sounds interesting, and I guess I will read up on that.

Exactly how to determine the endogeneous and exogeneous variables I can't tell. But since endogeneous is always something that "comes from you", i.e. you can influence it while the exogeneous stuff is something that you don't have under your control I guess in the model the IS curve is endogeneous while the LM curve would be exogeneous as should be the ZZ curve.
But that's just my guessing.
ok thanks! I'll try it...
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Old 02-05-2009, 11:53 AM   #26
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But read up on it if it's right.
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Old 02-05-2009, 01:44 PM   #27
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Alright. So... new problem I've encountered.






I really fucking suck at factoring polynomials and trinomials. Especially with problems that have a leading coefficient.

Here's an example from my textbook:

18 x^6 y^5 + 24 x^3 y^3
42 x^2 y^5


Seriously. Oh em gee. I think I'm kinda sorta screwed for my exam today.
I should have done my homework earlier..
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Old 02-05-2009, 03:03 PM   #28
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But read up on it if it's right.
ok, now I know how to do define those variables. As a result I got q decrease (this tobin's q) and Y & M decrease. I should draw this now, and the only thing I know is that if Y, G, q increases the IS-curve shifts to the right. Can I shift the IS/LM-curve to the left? I have never seen that... thx
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Old 02-05-2009, 03:14 PM   #29
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btw, if anyones done A2 biology coursework, Id appriciate some help.

I got told I need it on wednesday. I kinda put it off. A lot.
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Old 02-05-2009, 03:54 PM   #30
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Wow this thread really separates the Mathematicians and Scientists from the Linguists doesn't it
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Old 02-05-2009, 04:07 PM   #31
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Originally Posted by youtooellen View Post
Alright. So... new problem I've encountered.


I really fucking suck at factoring polynomials and trinomials. Especially with problems that have a leading coefficient.

Here's an example from my textbook:

18 x^6 y^5 + 24 x^3 y^3
42 x^2 y^5


Seriously. Oh em gee. I think I'm kinda sorta screwed for my exam today.
I should have done my homework earlier..
Ellen

For a problem like that, I'd suggest trying to factor the 2 separate poly/trionomials first and use the co-efficients, with a question like that it's simpler to solve them separately.

Another tip I can add is.. look for the greatest common factor and solve it like you would a quadratic equation, with assigning co-efficients to all.




<------------ took and SURVIVED (barely ) 2 years of Calculus, I and II.
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Old 02-05-2009, 04:33 PM   #32
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Originally Posted by achtung_girl View Post
ok, now I know how to do define those variables. As a result I got q decrease (this tobin's q) and Y & M decrease. I should draw this now, and the only thing I know is that if Y, G, q increases the IS-curve shifts to the right. Can I shift the IS/LM-curve to the left? I have never seen that... thx
I would say so. If the opposite happens (decrease) it should shift the curves to the left. It's rather a question if that really happens. It would mean that income and consumption would have to decrease, and same with the money supply I guess. That shouldn't be likely.
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Old 02-06-2009, 02:31 AM   #33
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I would say so. If the opposite happens (decrease) it should shift the curves to the left. It's rather a question if that really happens. It would mean that income and consumption would have to decrease, and same with the money supply I guess. That shouldn't be likely.
Ok, I don't have a better idea, so I'll draw like you said...
In this case, we have a exogenous reduction of q and fixed exchange rates. So I thought the endogenous variables are Y and M...and the rest was easy. That should be right. I think those questions are not very rational sometimes. (on purpose )
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Old 02-06-2009, 07:22 AM   #34
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Tell me if it was right, as I honestly have no clue.
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Old 02-06-2009, 08:44 AM   #35
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^I don't have the answers. Listen, what do you actually know about macroecon.?


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Old 02-06-2009, 08:45 AM   #36
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Nothing.
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Old 02-06-2009, 08:55 AM   #37
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Old 02-06-2009, 10:03 AM   #38
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I took my math exam last night and I'm pretty sure I rocked it.

I guess I was overly prepared in a way, studying for the past few days... several hours a day. Anywho, I know for a fact that I got at least an 'A' or something similar to a high mark.

I have a Physical Geography exam on Tuesday now.
I ditched all of my classes yesterday, just to prepare and study for my math exam.

Anyone familiar with the Earth's outer layers and their functions? (homosphere, heterosphere-- troposphere, stratosphere, mesosphere, thermosphere, etcetera.)
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Old 02-06-2009, 12:45 PM   #39
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Stratosphere, and a bit of troposphere I can help with. We did those recently in Env. science.

Stratosphere is where the important ozone layer is. About the height that planes fly at. (10-50km up)

In order the layers are:

(space)
Thermosphere
Mesosphere
Stratosphere
Troposphere
(Earth)

Is there anything specifically you need to know about them? I can probably look it up in my text book or scan a diagram or something.
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Old 02-06-2009, 06:55 PM   #40
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As a fourth year honours student with a penchant for language and literature, I can help out with the following:

1. Translating Old English and Middle English.
2. Turning uncomplicated sentences into needlessly complicated ones.
3. Rambling for twenty pages on a topic that interests approximately .0004% of the global population.
4. Deconstructing Jacques Derrida.*




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* Okay, I lied. Fuck you, Jacques Derrida. Fuck. You.
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