Published on 5 Jan 2016
We know that there are rich countries, poor countries, and countries somewhere in between. Economically speaking, Japan isn’t Denmark. Denmark isn’t Madagascar, and Madagascar isn’t Argentina. These countries are all different.
But how different are they?
That question is answered through real GDP per capita—a country’s gross domestic product, divided by its population.
In previous videos, we used real GDP per capita as a quick measure for a country’s standard of living. But real GDP per capita also measures an average citizen’s command over goods and services. It can be a handy benchmark for how much an average person can buy in a year — that is, his or her purchasing power. And across different countries, purchasing power isn’t the same.
Here comes that word again: it’s different.
How different? That’s another question this video will answer.
In this section of Marginal Revolution University’s course on Principles of Macroeconomics, you’ll find out just how staggering the economic differences are for three countries — the Central African Republic, Mexico, and the United States.
You’ll see why variations in real GDP per capita can be 10 times, 50 times, or sometimes a hundred times as different between one country and another. You’ll also learn why the countries we traditionally lump together as rich, or poor, might sometimes be in leagues all their own.
The whole point of this? We can learn a lot about a country’s wealth and standard of living by looking at real GDP per capita.
But before we give too much away, check out this video — the first in our section on The Wealth of Nations and Economic Growth.
March 20, 2017
Basic Facts of Wealth
March 5, 2017
Splitting GDP
Published on 21 Nov 2015
In the last three videos, you learned the basics of GDP: how to compute it, and how to account for inflation and population increases. You also learned how real GDP per capita is useful as a quick measure for standard of living.
This time round, we’ll get into specifics on how GDP is analyzed and used to study a country’s economy. You’ll learn two approaches for analysis: national spending and factor income.
You’ll see GDP from both sides of the ledger: the spending and the receiving side.
With the national spending approach, you’ll see how gross domestic product is split into three categories: consumption goods bought by the public, investment goods bought by the public, and government purchases.
You’ll also learn how to avoid double counting in GDP calculation, by understanding how government purchases differ from government spending, in terms of GDP.
After that, you’ll learn the other approach for GDP splitting: factor income.
Here, you’ll view GDP as the total sum of employee compensation, rents, interest, and profit. You’ll understand how GDP looks from the other side — from the receiving end of the ledger, instead of the spending end.
Finally, you’ll pay a visit to FRED (the Federal Reserve Economic Data website) again.
FRED will help you understand how GDP and GDI (the name for GDP when you use the factor income approach) are used by economists in times of economic downturn.
So, buckle in again. It’s time to hit the last stop on our GDP journey.
February 27, 2017
Real GDP Per Capita and the Standard of Living
Published on 20 Nov 2015
They say what matters most in life are the things money can’t buy.
So far, we’ve been paying attention to a figure that’s intimately linked to the things money can buy. That figure is GDP, both nominal, and real. But before you write off GDP as strictly a measure of wealth, here’s something to think about.
Increases in real GDP per capita also correlate to improvements in those things money can’t buy.
Health. Happiness. Education.
What this means is, as real GDP per capita rises, a country also tends to get related benefits.
As the figure increases, people’s longevity tends to march upward along with it. Citizens tend to be better educated. Over time, growth in real GDP per capita also correlates to an increase in income for the country’s poorest citizens.
But before you think of GDP per capita as a panacea for measuring human progress, here’s a caveat.
GDP per capita, while useful, is not a perfect measure.
For example: GDP per capita is roughly the same in Nigeria, Pakistan, and Honduras. As such, you might think the three countries have about the same standard of living.
But, a much larger portion of Nigeria’s population lives on less than $2/day than the other two countries.
This isn’t a question of income, but of income distribution — a matter GDP per capita can’t fully address.
In a way, real GDP per capita is like a thermometer reading — it gives a quick look at temperature, but it doesn’t tell us everything.It’s far from the end-all, be-all of measuring our state of well-being. Still, it’s worth understanding how GDP per capita correlates to many of the other things we care about: our health, our happiness, and our education.
So join us in this video, as we work to understand how GDP per capita helps us measure a country’s standard of living. As we said: it’s not a perfect measure, but it is a useful one.
February 19, 2017
Nominal vs. Real GDP
Published on 19 Nov 2015
“Are you better off today than you were 4 years ago? What about 40 years ago?”
These sorts of questions invite a different kind of query: what exactly do we mean, when we say “better off?” And more importantly, how do we know if we’re better off or not?
To those questions, there’s one figure that can shed at least a partial light: real GDP.
In the previous video, you learned about how to compute GDP. But what you learned to compute was a very particular kind: the nominal GDP, which isn’t adjusted for inflation, and doesn’t account for increases in the population.
A lack of these controls produces a kind of mirage.
For example, compare the US nominal GDP in 1950. It was roughly $320 billion. Pretty good, right? Now compare that with 2015’s nominal GDP: over $17 trillion.
That’s 55 times bigger than in 1950!
But wait. Prices have also increased since 1950. A loaf of bread, which used to cost a dime, now costs a couple dollars. Think back to how GDP is computed. Do you see how price increases impact GDP?
When prices go up, nominal GDP might go up, even if there hasn’t been any real growth in the production of goods and services. Not to mention, the US population has also increased since 1950.
As we said before: without proper controls in place, even if you know how to compute for nominal GDP, all you get is a mirage.
So, how do you calculate real GDP? That’s what you’ll learn today.
In this video, we’ll walk you through the factors that go into the computation of real GDP.
We’ll show you how to distinguish between nominal GDP, which can balloon via rising prices, and real GDP—a figure built on the production of either more goods and services, or more valuable kinds of them. This way, you’ll learn to distinguish between inflation-driven GDP, and improvement-driven GDP.
Oh, and we’ll also show you a handy little tool named FRED — the Federal Reserve Economic Data website.
FRED will help you study how real GDP has changed over the years. It’ll show you what it looks like during healthy times, and during recessions. FRED will help you answer the question, “If prices hadn’t changed, how much would GDP truly have increased?”
FRED will also show you how to account for population, by helping you compute a key figure: real GDP per capita. Once you learn all this, not only will you see past the the nominal GDP-mirage, but you’ll also get an idea of how to answer our central question:
“Are we better off than we were all those years ago?”
February 13, 2017
What is Gross Domestic Product (GDP)?
Published on 18 Nov 2015
Picture the economy as a giant supermarket, with billions of goods and services inside. At the checkout line, you watch as the cashier rings up the price for each finished good or service sold. What have you just observed?
The cashier is computing a very important number: gross domestic product, or GDP.
GDP is the market value of all finished goods and services, produced within a country in a year.
But, what does “market value” mean? And what defines a “finished good”?
These, and more questions, percolate inside your head. Meanwhile, the cashier starts ringing up the total, and you’re left confused. An array of things pass by you — A bottle of wine. A carton of eggs. A cake from the local bakers. A tractor, of all things. A bunch of ballpens. A bag of flour.
In this video, join us as we show you how to make sense of this important economic indicator. You’ll learn how GDP is computed, and you’ll get answers to some pretty interesting questions along the way.
Questions like, “Why are the eggs in my homemade omelet part of the GDP, but the eggs my baker uses are not? Why does my bottle of French wine contribute to France’s GDP, even if I bought it in the United States?”
Most importantly, you’ll also learn why polar bears aren’t part of the GDP computation, even if they’re incredibly cute.
So, buckle in for a bit—in the following videos we’ll dive into specifics on GDP.
December 31, 2016
Signaling
Published on 23 Sep 2015
A signal is an action that reveals information. Let’s look at higher education, for example. A large fraction of the value you receive from your degree comes on the day you earn your diploma. Your expected wages don’t increase with each class you complete along the way; instead, they spike sharply at the end when you receive your diploma. This is often referred to as the “Sheepskin Effect” because diplomas used to be printed on sheepskin.
Nobel Prize winner Michael Spence did research on this subject and found that education is valuable not necessarily because it creates valuable skills, but rather that it signals valuable skills. So how does the signal, represented by a degree, alleviate asymmetric information?
Employers don’t necessarily know how smart or skilled you are. Your degree, however, provides a credible signal of these traits and gives them more information they can use in the hiring process.
What other signals exist? We discuss examples like diamond engagement rings, why criminals tattoo their face, and why a peacock has a colorful tail. Let us know what examples you come up with in the comments.
December 6, 2016
Alex & Tyler’s Economist’s Christmas
Published on 5 Dec 2016
This week: Let’s get in the holiday spirit! What would an economist do about Christmas gifts?
What do you really want for the holidays? And how can you be sure you’re giving the perfect gift to someone else?
Of course, you want to get your loved ones something they will appreciate, but you face a knowledge problem: you don’t know everything about their wants and needs. You also have an incentive problem: oftentimes people aren’t quite as careful choosing a gift for others as they would be if buying something for themselves.
We’ve all received a present that we didn’t really want. When that happens, the value that we place on the gift can be less than its cost. According to research by economist Joel Waldfogel, gift givers spend an average of $50 on gifts that recipients only value at $40. Given that Americans spend around $100 billion on Christmas gifts, we’re wasting $18-20 billion every holiday season!
Is there a solution to this costly problem? Well, you can always give cold, hard cash! Many gift recipients would prefer it. But if you know the recipient’s tastes very well, you do have the opportunity to give them a non-cash present that they’ll love and that creates value by lowering their search costs.
There are, of course, occasions where the gift of money doesn’t make sense. Perhaps you want to signal that you care in a different way, or maybe there’s a custom you want to follow. You’ll just have to risk it in these situations.
Around the holidays, there’s also a spike in charitable giving. If you face knowledge and incentive problems in giving gifts to loved ones, you can imagine that these issues increase when you’re giving to someone you’ve never met. To combat this problem, some charities, such as GiveDirectly, give cash to people in need so that they spend charitable donations however meets their needs.
The efficiency of an economist’s Christmas may feel less warm and fuzzy, but the value creation is no less generous!
November 24, 2016
Solutions to Moral Hazard
Published on 23 Sep 2015
What are some solutions to moral hazard? We could try to make information less asymmetric — meaning both parties have similar information, making it harder for one party to exploit the other. We could also try to reduce the incentive of the agent to exploit their information advantage. Online ratings and reviews on Yelp, Angie’s List, or Amazon, for instance, incorporate both of these solutions. The reviews give you more information about a product or service and close the information gap between buyers and sellers. In addition, sellers’ incentives change, as they now have to think about their reputation. They likely won’t want to exploit you if they know it will result in a negative online review.
What are some other approaches to modifying the incentives of those with an information advantage? One approach is to split the diagnosis of a problem from the actual work that needs to be done — for instance, home inspectors don’t fix the problems they identify during their inspection. Another approach is to alter the payment structure to change incentives. For instance, a lawyer is less likely to run up their hours when payment is contingent on winning your case as opposed to the number of hours they work on the case. Ethics also plays a role. Doctors swear to the Hippocratic Oath, which provides them an incentive to not exploit their information advantage. As you can see, there are many solutions to addressing moral hazard.
November 16, 2016
Moral Hazard
Published on 23 Sep 2015
Imagine you take your car in to the shop for routine service and the mechanic says you need a number of repairs. Do you really need them? The mechanic certainly knows more about car repair than you do, but it’s hard to tell whether he’s correct or even telling the truth. You certainly don’t want to pay for repairs you don’t need. Sometimes, when one party has an information advantage, they may have an incentive to exploit the other party. This type of exploitation is called moral hazard, and can happen in many situations — a taxi driver who takes the “long route” to get a higher fare from a tourist, for example. In this video, we cover moral hazard and what is known as the principal-agent problem.
September 15, 2016
Asymmetric Information and Health Insurance
Published on 23 Sep 2015
In this video, we discuss asymmetric information, adverse selection, and propitious selection in relation to the market for health insurance. Health insurance consumers come in a range of health, but to insurance companies, everyone has the same average health. Consumers have more information about their health than do insurers. How does this affect the price of health insurance? Why would some consumers prefer to not buy health insurance at all? And how does this all relate to the Affordable Care Act? Let’s dive in.
September 5, 2016
Asymmetric Information and Used Cars
Published on 8 Jan 2015
George Akerlof, a Nobel Prize-winning economist, analyzed the theory of adverse selection – which occurs when an offer conveys negative information about what is being offered. In the market for used cars, Akerlof posited that sellers have more information about the car’s quality than buyers. He argued that this leads to the death spiral of the market, and market failure. However, the market has developed solutions such as warrantees, guarantees, branding, and inspections to offset information asymmetry.
August 24, 2016
The Tragedy of the Commons
Published on 26 Jun 2015
In this video, we take a look at common goods. Common resources are nonexcludable but rival. For instance, no one can be excluded from fishing for tuna, but they are rival — for every tuna caught, there is one less for everyone else. Nonexcludable but rival resources often lead to what we call a “tragedy of the commons.” In the case of tuna, this means the collapse of the fishing stock. Under a tragedy of the commons, a resource is often overused and under-maintained. Why does this happen? And how can we solve this problem? Like we’ve done so many times throughout this course, let’s take a look at the incentives at play. We also discuss Nobel Prize Winner Elinor Ostrom’s contributions to this topic.
August 20, 2016
Club Goods
Published on 26 Jun 2015
In this video we discuss club goods. Club goods are nonrival and excludable. For instance, HBO is a club good, as you need to pay a monthly fee to access HBO (excludable) but more viewers does not add to costs (nonrival). Entrepreneurs are always looking for ways to turn public goods into club goods — cable TV and satellite radio being two examples. Some entrepreneurs have even figured out how to profit from providing public goods — for instance, radio and broadcast television are public goods, but, thanks to advertising, they are profitable.
July 21, 2016
A Deeper Look at Public Goods
Published on 26 Jun 2015
Description: What do we mean by “nonexcludable” and “nonrival” when talking about public goods? Public goods challenge markets because it’s difficult to charge non-payers and it’s inefficient to exclude anyone — so, how do we produce them? Public goods provide an argument for taxation and government provision. But how do we know which public goods should be provided? In this video we cover the free-rider problem and the forced-rider problem in regards to public goods. We also discuss examples of the four different categories of goods, which will be covered in future videos: private goods, commons resources, club goods, and public goods.
July 6, 2016
Public Goods and Asteroid Defense
Published on 26 Jun 2015
While the probability of an asteroid hitting the planet is very low, its effect would be disastrous for all of us. So, who should pay for asteroid protection? A good like asteroid defense — a public good, meaning it’s nonexcludable and nonrival — has some unusual properties that challenge markets. We explore the curious case of public goods in this video and others in this section.
