シャドーイング練習: Introduction to Economics Part 1 - Professor Ryan - 動画で英語スピーキングを学ぶ

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Alright folks, welcome to a semester in economics.

And what we're going to do in this very first lesson is we are going to define economics

and try to get an understanding of what it is exactly, this subject that we're learning.

So you should have a notebook in front of you

or some paper so that you can take notes and I recommend

that you write down everything

that I write down up here on the board in your notes

so that you can study and add a few extra notes of things

that I say or maybe some things that will trigger memories while you're learning this stuff, okay?

So what is economics?

Well I have my own definition, there's probably several definitions out there, I'm sure there are plenty of textbooks that have definitions of economics.

Well there's one in particular that I like to work from and I'm going to give you that definition right now.

And after I give you that definition, so we're going to say economics.

What is economics?

All right.

After I give you my definition, I'm going to break down the definition into four main pieces

so that you can have a better understanding of how we're going to focus on learning this semester.

Okay.

So here's my definition of economics.

To me, economics is the scientific study of how individuals,

that's like people, right?

Individual people.

Organizations.

So that's like businesses or maybe government organizations or not -for -profit organizations.

You know, groups of people who come together to either make a profit or achieve some kind of goal.

Or, let's say, or societies.

Now, a society is like an entire country or an entire city or an entire state.

Okay, change that to a societies

or societies deal with the problem of scarcity.

Scarcity.

Okay, that's S -C -A -R -C -I -T -Y.

Scarcity.

That word right there, scarcity, that is the main word in economics.

That is the most important word in economics.

If I were to give you a much simpler definition of economics, I would just simply say it is the study of scarcity.

And I'm going to talk about scarcity in just a few minutes.

So there are four main elements of this definition.

The first thing I want to tell you is that economics itself is scientific.

that it focuses on individuals, organizations, and societies.

So that's its own one category.

Economics has to do with how these groups or individuals, how they deal with.

Now, the idea of dealing with is the idea of making a decision.

When you want to deal with something, when you get a flat tire, you have to deal with that flat tire.

And what that means is to make decisions about how to handle that flat tire.

So dealing with is the idea of decision making.

Having to make a decision.

A decision about what?

Well, a decision about the fact that you are facing the problem of scarcity.

You as an individual are facing the problem of scarcity.

Or an organization is facing the problem of scarcity or an entire society, a country, or a state,

or a city, is facing the problem of scarcity.

And like I said, I'm going to define scarcity in just a little bit.

Okay, so here are the four things we're going to focus on.

Is economics as scientific, economics as focusing on individuals, organizations, and societies, economics as dealing with decision making,

and economics as handling the problem of scarcity.

So in order to do that, what I want you to do right now is I want you to, on your notes, in your paper, I'm going to break up the board into four quadrants,

like this, four quadrants.

And I think you should also break up your notes into four quadrants.

And we're going to put each one of these subjects in each one of these quadrants.

So economics is scientific.

So we're going to talk about what that means.

Economics is concerned with individuals and organizations.

or firms, and societies, whole, large groups of individuals.

That economics focuses on dealing with, deal with, what does it mean to deal with something?

Okay?

And then lastly, we have the problem of scarcity.

The problem of scarcity.

Okay?

So we're going to take these one at a time in the order that they are in the definition.

So economics is scientific.

Alright, so economics is a science.

There are scientific journals animals devoted to economics.

There are people, researchers, people who get paid lots of money, well they probably don't get paid as much as they want to get paid,

but nonetheless, there are people who get paid money just to do research on economics, research on the problem of scarcity,

research on individuals, organizations, and societies and how they deal with the problem of scarcity.

And because economics is scientific, there are certain things that go along with all science.

And two of those things that we're going to focus on, we're not going to do all of science, but the two main things I want you to understand is that in science,

when we approach a subject in science,

we have to make assumptions and we have to draw conclusions.

We make assumptions and we draw conclusions.

Now I want to clarify something here, and that is this class is a principles of economics class.

This is not some masters or PhD level class where we're going to dig very deep into the research of economics.

What you're supposed to be learning in this class are the basic, foundational, fundamental principles of economics.

And that's what I'm going to focus on.

So here's what I'm going to do.

When we talk about these assumptions and conclusions, especially the assumptions, I want you to understand that the assumptions

that we're going to use in this economics class might not be the kinds of assumptions

that would be used in a much higher level economics class.

So if you decide that you're going to someday get a masters or a PhD in economics, you might find out something,

you might learn something in that economics class and think back to this class and say, wow, Professor Ryan was wrong.

What you have to understand is that the assumptions

that we're going to make are important when you're at the beginning stages of learning economics.

So I'm warning you that some of the things that we're going to learn throughout this semester, some of the things that I'm going to teach you, are really only foundational principles.

But when you get to higher levels of economics,

oftentimes we relax or eliminate those foundational concepts and augment them into something much more detailed or much larger or much grander.

So I'm warning you in advance.

This is a principles class.

You are learning the basics of economics, okay?

100

Alright, so, one of the basic assumptions, well, I'm going to give you two basic assumptions in economics.

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The first one is called the Ceteris, that's C -E -T -E -R -I -S, Paribus.

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That's P -A -R -I -B -U -S.

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That's the Ceteris Paribus Assumption.

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I'm going to put quote marks around it.

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What does ceteris paribus mean?

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Ceteris paribus basically means to examine one variable by not changing any of the other variables.

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You are holding everything else constant so that you can isolate the effects of a single variable on some other phenomenon.

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Okay, so Ceteris Paribus says that we're isolating all other variables so that we can examine one variable that's changing,

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because here's what's going to happen in this class is I'm going to say something like, hey, when things are cheaper,

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people buy more of it.

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And then you're going to say, well, not always.

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Sometimes when things are cheaper, people don't want them at all.

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And I'm going to say, you know what?

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You're right.

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Sometimes things are so cheap that people don't want them at all.

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But I'm using the ceteris paribus assumption.

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We're going to assume that it's the kind of product that everybody wants.

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And so now, if it's a product that everybody wants and the price goes down, people are going to buy more of it because they do want it.

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We're going to assume that it is something that people want.

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So for example, if the price of garbage goes down, people may say, no, I don't want any more garbage.

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I'm trying to get rid of my garbage.

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Well, yes, I agree with you.

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But if we're talking about something normal, like a cheeseburger, or french fries, or a car, then we can assume,

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ceteris paribus, that when the price goes down, that people will buy more of it, okay?

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So that's our first assumption in economics, is the ceteris paribus assumption.

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The second assumption, what is the second assumption?

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Oh, the second assumption is rationality, rationality, okay?

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Now, this is a really, really, we got to be very flexible with this rationality assumption,

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assumption, but we're still going to use this rationality assumption in this principles class.

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Here's what the rationality assumption says.

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The rationality assumption says that people in general are rational decision makers.

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Meaning, if you give them a choice of whether they can have $20 or $30,

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that they will choose $30 every single time.

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And you might say to yourself, oh, there must be some kind of catch.

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No, I'm telling you, there's no catch.

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Your choices are $20 or $30.

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Which one do you want?

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Everything else is the same.

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And then, obviously, the rational person is going to say, well, I'd rather have more money than less money, so I'm going to take $30.

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Yes, exactly.

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We're going to assume that you are a rational person, that I am a rational person, that I want more good stuff,

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and I want less bad stuff in my life.

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That is rationality, okay?

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So that's the second assumption.

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And because economics is scientific, we have to start somewhere, and where we're going to start is that we're only going to look at one variable at a time,

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and then also we're going to assume that people are making rational decisions,

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that they're not insane, that they are not out to get worse things for themselves, and less better things.

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No, that doesn't make any sense.

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We're going to assume that the people, that the individuals, the organizations, and societies that we're dealing with are rational.

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Okay?

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All right, now let's move on to conclusions.

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Oftentimes what we do in economics is after we learn something new or after we understand something,

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we then draw a conclusion, right?

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And here's how it goes.

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For example, let's say that people are spending more of their money on one kind of cereal.

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People are spending more money on Lucky Charms than they are spending on Cheerios.

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And so we might draw a conclusion.

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Well, if people are buying more Lucky Charms than Cheerios and Ceteris Paribus, they both have the same price,

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then people must like here I'm going to draw a conclusion now.

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Well, I'm now going to conclude that people prefer Lucky Charms over Cheerios.

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Now that may not be true in reality, but in my example that is a conclusion.

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And often times when we draw conclusions in economics there are two kinds of conclusions that we can draw.

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We can draw or we can come to conclusions that are what we call positive conclusions or normative conclusions.

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And what we're going to try and focus on in this class is we're going to primarily focus on positive conclusions, not normative conclusions.

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positive means let's see here what is what is and normative conclusions are what should

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be what should be we are going to avoid the what

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should be conclusions now you're going to want to make some

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normative conclusions as you go through this class you're going to say oh because of that, that means that's terrible, then this is what we should do.

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So for example, you might say, oh, we might find out economically that there are people in this world who can't have health care.

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They can't get help when they're sick.

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And you may think to yourself, oh my goodness.

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Now, the fact that we conclude that there are people who don't get medical help.

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That is a positive conclusion.

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It's just a truth.

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Nobody would argue.

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Generally speaking, people do not argue over positive conclusions.

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And so what I'm going to put over here is, I'm going to say here, no arguments.

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No arguments over positive economics.

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Sometimes we call it positive economics and normative economics.

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So I'm going to put positive econ, and here it's going to be normative econ, okay?

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So in positive economics, generally, people do not argue over the truth.

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Everybody agrees that 17 % of the people get no health care at all.

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Yes.

184

What do your numbers say?

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17%.

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What do your numbers say?

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17%.

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We all agree there's no argument, but here's where it becomes argumentative, okay?

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People disagree over what that means we should do.

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People disagree because of their values, because of their value judgments, okay?

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So, values, because of their values, people disagree on normative economics about what should be done.

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And what some people are going to say is, wow, well, those 17 % of people, they should be able to get medical care.

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And therefore, what we should do is take some money from somewhere and give those people medical care.

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And some other person, because they have different values, they're going to say, no, that's not what it means at all.

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That would be very expensive.

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We can't take money away from those other things to give health care to these people.

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They're just going to have to deal with not having health care.

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And this is where people argue is in the normative economics.

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We will do a little bit of normative economics and you will hear me make statements that are related to normative economics.

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And I may say some things that you will disagree with.

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And when you disagree with me, chances are you have different values than I have.

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And that's okay.

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You can have different values than me.

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You should have different values than me you can have very similar values, but generally speaking, every human being has a different set of values.

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And so we're going to disagree sometimes on what should be done.

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But positive economics is what is, generally speaking, there are no arguments over that.

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And here's what I'm telling you.

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As far as positive economics, one of the things that we're going to learn in positive economics is the fact

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that when the price of something goes down, people do buy more of it.

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And we're going to get to that in a much later lesson.

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Okay?

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But that's an example of positive economics.

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All right.

214

So economics is scientific.

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このレッスンの語彙とスピーキングのポイント

このスピーキングレッスンは、動画「Introduction to Economics Part 1 - Professor Ryan」を教材にしています。繰り返し出てくる語は次のとおりです：economics, assumption, conclusion, scarcity, positive。この動画には、シャドーイング用の文が212文、単語が2506語あります。音声の長さは17:43です。話す速さは1分あたり約141語で安定しており、シャドーイングしやすいペースです。単語の85%は英語の頻出3,000語に含まれます。残りは練習の前に確認しておきましょう。

この動画の重要語彙

動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。

単語	発音	意味
economics 名詞	/ˌiːkəˈnɒmɪks/	経済学
conclusion 名詞	/kənˈkluːʒən/	終わり, 結び
variable 形容詞	[ˈvæɹ.i.ə.bl̩]	可変, 変えられる
disagree 動詞	/dɪsəˈɡɹi/	反対する, 異なる
rational 形容詞	/ˈɹæʃ(ə)nəl/	合理的
principle 名詞	/ˈpɹɪn.sɪ.pəl/	原理, 原則
argue 動詞	/ˈɑɹ.ɡju/	議論する, 論ずる
garbage 名詞	/ˈɡɑɹ.bɪd͡ʒ/	ごみ, 廃物
semester 名詞	/sɪˈmɛstɚ/	学期
tire 動詞	/ˈtaɪ̯ɚ/	疲れる
lesson 名詞	/ˈlɛs.ən/	授業, 学科
examine 動詞	/ɪɡˈzæmɪn/	調べる
conclude 動詞	/kənˈkluːd/	終える, 締め括る
isolate 動詞	/ˈaɪ.sə.leɪt/	切り離す, 隔絶する
element 名詞	/ˈɛləmənt/	要素, エレメント

動画に出てくる句動詞

単語	意味
go down 動詞	降りる, 降下する
find out 動詞	見出す, 調べる
write down 動詞	書き留める, 記す

繰り返し練習したい文

動画に出てくる短く完結した文です。日常会話でそのまま使えます。

I'm going to put quote marks around it.
And I'm going to say, you know what?
I'm trying to get rid of my garbage.
Which one do you want?
What do your numbers say?

この動画の文法

話し手がよく使っている文型を、動画の実際の表現とともに紹介します。

文型	動画での表現
関係詞節 who / which + 節 — 人や物について情報を加える	people who come · people who get · people who don
受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる	is called · should be done

注意したい発音

話し手はwe're, I'm, you'reなど、短縮形や弱形を77回使っています。聞こえたとおりの短い形で発音しましょう。

「sh」と「zh」の音: assumption /əˈsʌm(p).ʃ(ə)n/, conclusion /kənˈkluːʒən/, rational /ˈɹæʃ(ə)nəl/, foundational /faʊnˈdeɪ.ʃə.nəl/
長い単語（アクセントの位置に注意）: economics /ˌiːkəˈnɒmɪks/, primarily /ˈpɹaɪ.mə.ɹə.li/, fundamental /ˌfʌn.dəˈmɛn.təl/, eliminate /ɪˈlɪm.ɪ.neɪt/, phenomenon /fəˈnɒm.ɪ.nən/

日本語話者が苦手な音：

/r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: variable [ˈvæɹ.i.ə.bl̩], rational /ˈɹæʃ(ə)nəl/, principle /ˈpɹɪn.sɪ.pəl/, primarily /ˈpɹaɪ.mə.ɹə.li/, relax /ɹɪˈlæks/
/v/ — /b/ にならないように、上の歯を下唇に当てる: variable [ˈvæɹ.i.ə.bl̩], devote /dɪˈvəʊt/, normative /ˈnɔːmətɪv/, argumentative /ˌɑɹɡjəˈmɛn(t)ətɪv/
/f/ — 「フ」ではなく、上の歯と下唇で出す: define /dɪˈfaɪn/, fundamental /ˌfʌn.dəˈmɛn.təl/, folk /foʊk/, flexible /ˈflɛk.sɪ.bəl/, phenomenon /fəˈnɒm.ɪ.nən/

この動画での練習方法

まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
自分の声を録音して元の音声と比べます。economics, conclusion, variableなどの単語に特に注意しましょう。

シャドーイングとは？英語上達に効果的な理由

シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: Introduction to Economics Part 1 - Professor Ryan - 動画で英語スピーキングを学ぶ

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Introduction to Economics Part 2 - Professor Ryan

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このレッスンの語彙とスピーキングのポイント

この動画の重要語彙

動画に出てくる句動詞

繰り返し練習したい文

この動画の文法

注意したい発音

この動画での練習方法

シャドーイングとは？英語上達に効果的な理由