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Mathy version of MPC and multiplier (optional) | Macroeconomics | Khan Academy

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Generalizing what we did in the last video with more math
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5 сен 2024

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Комментарии : 23

@joeydeg 12 лет назад

I am currently studying for my economics exams, and now I finally see where that multiplier formula comes from. Thanks!

@supernovic99 5 месяцев назад

I only remember things well if I can understand them and that's why I love your videos. You explain things really intuitively and explain actual proofs. Thanks a lot!

@baldwinvhanda1123 6 лет назад

well understood.... marvelous job..... keep on assisting

@LunHaolai 8 лет назад

You make it look so simple.... Great job

@MrTugwit 8 лет назад

Khan Academy, at 8:15, you show ΔY = ΔYo (1/(1-c)). That's ILLEGAL addition, ΔYo, before multiplication by 1/(1-c).

@davidnunoruano3283 6 лет назад

I think that the explanation is wrong. The sum of (1+c+c^2... c^n) is not 1/(1-c) but (c^(n+1)-1)/(c-1) because is a geometric progression. The correct explanation is that THE SUM OF THE LIMIT of (1+c+...c^n) tending c to infinity is 1/(1-c).

@taintedruins 7 лет назад

MORE MATHY

@bradley7499 7 лет назад

So just wondering how can the infinite number be simpliefied to a finite number?

@alexandrecruzado6659 6 лет назад

Arsonic it's called a limit

@mohammadhosseinhosseini6634 3 года назад

excellent. thank you very much for explaining this much fluent and simple ❤️❤️🙏🌹♥️

@EphraimAtkinson 12 лет назад

Question, because summing of infinite series is something that came up in another video (see minutephysics' video on "Adding Past Infinity"): I thought that associative and commutative properties don't apply to infinite series (according to a family mathematician). Can you clarify? Thanks.

@mareenazam7100 6 лет назад

so helpful and understandable.. thanks a lot!

@Rimmer7 12 лет назад

MPC = 299 792 458 m/s

@antoniaangelopoulou4269 6 лет назад

good job

@vishnuvardhan_me1892 3 года назад

Video made in 2012. I'm watching it in 2020

@yousefwalid522 3 года назад

2021**

@EphraimAtkinson 12 лет назад

Ah, thanks.

@MrTugwit 11 лет назад

At 8:15, ΔY = ΔYo (1/(1-c)). From that, the "multiplier" 1/(1-c) = ΔY / ΔYo. So the "multiplier" equation actually says ΔY = ΔYo (ΔY / ΔYo) = ΔY. That's the same ΔY you start with. It's Keynesian circular algebra. The Keynesian "multiplier" is mathematical nonsense.

@jocaingles8464 6 лет назад

your algebra just proves ΔY = ΔY If you think its mathematical nonsense, its because you're not understanding the math

@brionespolo 11 лет назад

Did anyone else think he meant Delta Y not?.... like whatever why not Delta haha.. Nerds. =D

@mareenazam7100 6 лет назад

Because the small zero sign in mathematics is read as "not". And we mostly use this Y(not) P(not) in Statistics.

@fordguy001 12 лет назад

9:02 pizza faces

@NathanJosephCole 12 лет назад

This is utter nonsense because it treats the farmer as one who has infinite resources to provide food to the builder. Increasing consumption might do this if and only if the farmer set aside extra resources ahead of time (which he has no motivation to do because it causes the cost of his crop to go down), and even where that is the case, the effect only lasts for a limited run.