Prática de Shadowing: Introduction to Economics Part 1 - Professor Ryan - Aprenda a falar inglês com vídeo
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Alright folks, welcome to a semester in economics.
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And what we're going to do in this very first lesson is we are going to define economics
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and try to get an understanding of what it is exactly, this subject that we're learning.
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So you should have a notebook in front of you
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or some paper so that you can take notes and I recommend
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that you write down everything
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that I write down up here on the board in your notes
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so that you can study and add a few extra notes of things
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that I say or maybe some things that will trigger memories while you're learning this stuff, okay?
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So what is economics?
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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.
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Well there's one in particular that I like to work from and I'm going to give you that definition right now.
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And after I give you that definition, so we're going to say economics.
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What is economics?
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All right.
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After I give you my definition, I'm going to break down the definition into four main pieces
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so that you can have a better understanding of how we're going to focus on learning this semester.
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Okay.
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So here's my definition of economics.
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To me, economics is the scientific study of how individuals,
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that's like people, right?
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Individual people.
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Organizations.
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Organizations.
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So that's like businesses or maybe government organizations or not -for -profit organizations.
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You know, groups of people who come together to either make a profit or achieve some kind of goal.
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Or, let's say, or societies.
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Now, a society is like an entire country or an entire city or an entire state.
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Okay, change that to a societies
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or societies deal with the problem of scarcity.
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Scarcity.
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Okay, that's S -C -A -R -C -I -T -Y.
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Scarcity.
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That word right there, scarcity, that is the main word in economics.
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That is the most important word in economics.
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If I were to give you a much simpler definition of economics, I would just simply say it is the study of scarcity.
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And I'm going to talk about scarcity in just a few minutes.
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So there are four main elements of this definition.
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The first thing I want to tell you is that economics itself is scientific.
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that it focuses on individuals, organizations, and societies.
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So that's its own one category.
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Economics has to do with how these groups or individuals, how they deal with.
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Now, the idea of dealing with is the idea of making a decision.
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When you want to deal with something, when you get a flat tire, you have to deal with that flat tire.
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And what that means is to make decisions about how to handle that flat tire.
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So dealing with is the idea of decision making.
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Having to make a decision.
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A decision about what?
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Well, a decision about the fact that you are facing the problem of scarcity.
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You as an individual are facing the problem of scarcity.
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Or an organization is facing the problem of scarcity or an entire society, a country, or a state,
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or a city, is facing the problem of scarcity.
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And like I said, I'm going to define scarcity in just a little bit.
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Okay, so here are the four things we're going to focus on.
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Is economics as scientific, economics as focusing on individuals, organizations, and societies, economics as dealing with decision making,
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and economics as handling the problem of scarcity.
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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,
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like this, four quadrants.
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And I think you should also break up your notes into four quadrants.
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And we're going to put each one of these subjects in each one of these quadrants.
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So economics is scientific.
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So we're going to talk about what that means.
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Economics is concerned with individuals and organizations.
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or firms, and societies, whole, large groups of individuals.
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That economics focuses on dealing with, deal with, what does it mean to deal with something?
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Okay?
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And then lastly, we have the problem of scarcity.
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The problem of scarcity.
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Okay?
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So we're going to take these one at a time in the order that they are in the definition.
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So economics is scientific.
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Alright, so economics is a science.
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There are scientific journals animals devoted to economics.
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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,
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but nonetheless, there are people who get paid money just to do research on economics, research on the problem of scarcity,
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research on individuals, organizations, and societies and how they deal with the problem of scarcity.
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And because economics is scientific, there are certain things that go along with all science.
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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,
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when we approach a subject in science,
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we have to make assumptions and we have to draw conclusions.
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We make assumptions and we draw conclusions.
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Now I want to clarify something here, and that is this class is a principles of economics class.
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This is not some masters or PhD level class where we're going to dig very deep into the research of economics.
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What you're supposed to be learning in this class are the basic, foundational, fundamental principles of economics.
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And that's what I'm going to focus on.
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So here's what I'm going to do.
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When we talk about these assumptions and conclusions, especially the assumptions, I want you to understand that the assumptions
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that we're going to use in this economics class might not be the kinds of assumptions
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that would be used in a much higher level economics class.
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So if you decide that you're going to someday get a masters or a PhD in economics, you might find out something,
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you might learn something in that economics class and think back to this class and say, wow, Professor Ryan was wrong.
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What you have to understand is that the assumptions
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that we're going to make are important when you're at the beginning stages of learning economics.
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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.
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But when you get to higher levels of economics,
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oftentimes we relax or eliminate those foundational concepts and augment them into something much more detailed or much larger or much grander.
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So I'm warning you in advance.
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This is a principles class.
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You are learning the basics of economics, okay?
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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.
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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.
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So economics is scientific.
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Vocabulário e dicas de fala para esta lição
Esta aula de conversação usa o vídeo “Introduction to Economics Part 1 - Professor Ryan”. As palavras que mais se repetem: economics, assumption, conclusion, scarcity, positive. Este vídeo tem 212 frases e 2506 palavras para praticar shadowing. A fala dura 17:43. O falante mantém um ritmo estável de cerca de 141 palavras por minuto, confortável para o shadowing. 85% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.
Vocabulário principal deste vídeo
15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| economics substantivo | /ˌiːkəˈnɒmɪks/ | economia |
| assumption substantivo | /əˈsʌm(p).ʃ(ə)n/ | suposição, pressuposição |
| conclusion substantivo | /kənˈkluːʒən/ | conclusão |
| variable adjetivo | [ˈvæɹ.i.ə.bl̩] | variável |
| disagree verbo | /dɪsəˈɡɹi/ | discordar |
| rational adjetivo | /ˈɹæʃ(ə)nəl/ | racional |
| principle substantivo | /ˈpɹɪn.sɪ.pəl/ | princípio |
| argue verbo | /ˈɑɹ.ɡju/ | discutir, argumentar |
| garbage substantivo | /ˈɡɑɹ.bɪd͡ʒ/ | lixo |
| semester substantivo | /sɪˈmɛstɚ/ | semestre |
| tire verbo | /ˈtaɪ̯ɚ/ | cansar, fatigar |
| lesson substantivo | /ˈlɛs.ən/ | lição |
| define verbo | /dɪˈfaɪn/ | definir |
| examine verbo | /ɪɡˈzæmɪn/ | examinar, analisar |
| conclude verbo | /kənˈkluːd/ | concluir |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| go down verbo | descer |
| find out verbo | descobrir |
| write down verbo | anotar |
Frases que vale a pena repetir
Frases curtas e completas do vídeo que você pode usar na conversa do dia a dia:
- 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?
Gramática neste vídeo
As estruturas que o falante mais usa, com as palavras exatas do vídeo:
| Estrutura | No vídeo |
|---|---|
| Orações relativas who / which + oração — informação extra sobre uma pessoa ou coisa | people who come · people who get · people who don |
| Voz passiva be + particípio passado — o foco está no que acontece, não em quem faz | is called · should be done |
Pronúncia para ficar de olho
O falante usa 77 contrações e formas reduzidas, como we're, I'm, you're. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “sh” e “zh”: assumption /əˈsʌm(p).ʃ(ə)n/, conclusion /kənˈkluːʒən/, rational /ˈɹæʃ(ə)nəl/, foundational /faʊnˈdeɪ.ʃə.nəl/
- Palavras longas — acerte a sílaba tônica: economics /ˌiːkəˈnɒmɪks/, primarily /ˈpɹaɪ.mə.ɹə.li/, fundamental /ˌfʌn.dəˈmɛn.təl/, eliminate /ɪˈlɪm.ɪ.neɪt/, phenomenon /fəˈnɒm.ɪ.nən/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: conclude /kənˈkluːd/, isolate /ˈaɪ.sə.leɪt/, element /ˈɛləmənt/, judgment /ˈd͡ʒʌd͡ʒ.mənt/, folk /foʊk/
- /l/ final — a língua toca o céu da boca, não vira “u”: rational /ˈɹæʃ(ə)nəl/, principle /ˈpɹɪn.sɪ.pəl/, fundamental /ˌfʌn.dəˈmɛn.təl/, flexible /ˈflɛk.sɪ.bəl/, cereal /ˈsɪə.ɹɪ.əl/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como economics, assumption, conclusion.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.