Functions of money

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Functions of money발음듣기

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[Voiceover] Hello, everyone, Grant here.발음듣기

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So I'd like to talk to you today about the various functions of money.발음듣기

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Functions of money.발음듣기

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Now money, of course, is something that we all use every day and we kind of have a general feel for what it is, but it's interesting to step back and actually contemplate what is money.발음듣기

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What gives it its value?발음듣기

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What is it that we use it for?발음듣기

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Why is it that you can use some things for money throughout history, you know, people have used not just gold and silver but things like salt or cigarettes as money, and why other things can't be used.발음듣기

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And economists generally divide the functions of money, the things that it does for us into three different categories.발음듣기

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And sometimes people add a fourth in there.발음듣기

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I won't get to that in this video, I'll talk about it in a different one, but there's kind of three main ones that people usually talk about.발음듣기

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So if you were an economist, just kind of philosophizing about what the functions of money are, you might start by thinking, well, what does the world look like without money?발음듣기

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Like, for example, let's say that you were a lawyer and you provide legal counsel to people and this is the service that you provide and this is the way you add value to the economy, and let's say it's the case that you're refurnishing and you want a chair, you want to go out into the world and you want to buy a chair.발음듣기

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Well, what that would require is that you find someone who happens to produce chairs.발음듣기

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You find some person out there, and his way of adding value to society is to produce chairs, and this is what he does, and he's specialized at it and he's very good.발음듣기

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Now the issue here, because money doesn't exist, you basically have to trade with him, you have to barter in some way.발음듣기

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And this is what's called a barter economy.발음듣기

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And in order to do that, given that you've specialized in law, is the thing that you provide and add value with, you kind of have to hope that he wants legal services.발음듣기

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If he happens to be in a situation where he wants the thing that you provide, which in this case is legal services, and if that were true and you had that good fortune, then you would be able to trade some legal services over to him and he would trade you some number of chairs, and all would be well.발음듣기

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But of course, this is kind of rare, especially given how specialized you are.발음듣기

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And this idea where you want something and he wants something and those line up with each other actually has a name.발음듣기

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This is called the double coincidence of wants.발음듣기

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Double coincidence, and it's worth writing down because people kind of reference this when we're talking about barter economies of wants.발음듣기

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And by barter economy I just mean you know, this kind of set-up, but scaled up to the scale of society where everybody's trading based on their specialty and what someone else needs.발음듣기

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And in a world of money this seems absurd, because in reality what you do, is you would be over here, and sure you would provide your legal services, you'd kind of provide legal services to someone as your way of adding value, but it would be for just anyone who wants it, not based on what they produce, and in response, in exchange for that, they give you cash, they just give you money, something that you can then use, that everybody accepts for whatever it is that you want.발음듣기

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So in this case, if you want chairs, then you bring it over to the guy who produces chairs and that's what he gives you, you know, a chair.발음듣기

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And in so far as money serves this function, where it is kind of the universal thing to trade, it's called a medium of exchange, medium of exchange.발음듣기

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And what that means is anytime that you want to exchange for something, this is the common thing of value that you use to actually trade with the world.발음듣기

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But that's not the only thing money does.발음듣기

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That's a really big part, that kind of allows the entire economy to exist, and it allows you to specialize in something like legal services.발음듣기

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But what else does money do?발음듣기

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What else would be harder to do in a world without money?발음듣기

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Let's say you produce, as a lawyer, you know, producing legal services, a little bit more that you actually wanted to consume, and you're hoping to kind of save up some value, so that maybe later on you can buy a house, or you can pay for your kid's education or something like that.발음듣기

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You want to actually start storing value and saving it up.발음듣기

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Well, in this barter economy, you would have to find something, since money doesn't exist, you would have to find something of value and start storing that.발음듣기

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Maybe, you know, chairs might hold their value so you're hoping to store them or maybe you have to buy land or something that you think will store it, but there's not kind of a good de facto medium that you can do it for.발음듣기

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So in this sense, since that's something that we usually do with money, it's also called a good store of value.발음듣기

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So this is considered kind of a second use of money, store of value, distinct from a medium of exchange, because the idea of needing something to trade with is pretty different from wanting to kind of save value.발음듣기

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And for this third function, think back to this case where you're hoping to barter legal services for chairs.발음듣기

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I mean, once you start getting into the specifics, you can start asking the question, well, actually, how many hours of legal services correspond to one chair?발음듣기

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And if you want to buy something different, you're going grocery shopping, how many hours of legal services corresponds to buying one apple?발음듣기

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And similarly the chair guy, he has to go off and every time he's gonna buy an apple, he has to think how many chairs correspond to an apple?발음듣기

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And trying to relate values like this starts getting really complicated unless you just have some kind of actual unit to deal with, something that you can use to actually measure value of everything, like a yardstick for value.발음듣기

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And of course in the real economy, we just give everything a dollar value, or a euro value, or a peso value, depending on where you are, but you give it a value that corresponds to the currency, to the money that you're dealing with.발음듣기

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So people will say money serves as a unit of value, a unit of value, and basically that means that it gives you the starting number, it gives you the meaning of the number one so that you can say, well if this is worth one dollar, then what is worth three dollars?발음듣기

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Or maybe an hour of this lawyer's time is worth a hundred dollars, and one of these chairs is worth $50, and you can start actually comparing the values of various different goods that way.발음듣기

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And I actually think this is a pretty interesting one.발음듣기

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This is the kind of thing that would be easy to underappreciate until you realize how important it is to have something like this.발음듣기

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And in the next video or two I'm going to talk about a certain historical case of hyperinflation in Brazil where basically what happens is money loses some of these functions, and you can see just how much a society actually breaks down if what is supposed to be money stops serving these functions.발음듣기

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So with that, I will see you next video.발음듣기

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