We economists marvel, too, but we also wonder how free apps fit into GDP. They do have their long-run downside, as we forget how to read maps and plot routes ourselves. (Anybody out there remember how to work a slide rule? No? That’s not a loss for computation but it does mean lower average numeracy.) But in the short run they save billions of hours in wrong turns not taken and trillions of cells of stomach lining no longer eaten up by travel anxiety. Not to mention their entertainment value.
But hardly any of that very big upside shows up in GDP. In one respect, in fact, GDP goes down. I used to buy maps, including travel atlases. I’m unlikely to do that anymore. Maps purchased by consumers are a “final good or service” and thus do enter into GDP. Maps I interact with online but don’t pay for aren’t GDP. So well-being has gone up — a lot — as a result of Google Maps. But GDP may well have gone down.
In fact, apps do produce some GDP. Google sustains itself in part by selling ads, including to retailers and restaurants looking to pay for prominent mention on its map display. Its ad revenue is an intermediate input into GDP. Many of the entities buying Google ads are in the business of selling “final goods or services” and if they’re money-making, the prices of their goods have to cover the cost of their ads. So by that circuitous route the “value” of the apps does end up in GDP.
But what’s the relationship between what advertisers pay for my eyeballs and the value of the app to me? The two are not completely unrelated. The more I use the app the more I’m likely to buy the advertised products, presumably. But in practice, the probability of my buying is pretty small while my benefit from the app is pretty big. How strange that miracle apps can change our lives but not our GDP.
William Watson, “How using Google Maps on your summer road trip messes with the GDP”, Financial Post, 2017-07-18.
August 3, 2017
QotD: Improved quality of life doesn’t always show up in GDP figures
June 19, 2017
Office Hours: The Solow Model
Published on 20 Apr 2016
In last week’s Principles of Macroeconomics video, you learned about the steady state level of capital and the Solow model of economic growth. Here are two of the practice questions from that video:
Country A has K=10,000 and produces GDP according to the following equation: GDP=5√K.
1) If the country devotes 25% of its GDP to making investment goods, how much is the country investing?
2) If 1% of all machines become worthless every year (they depreciate, in other words) in Country A, GDP is…?
June 4, 2017
Intro to the Solow Model of Economic Growth
Published on 28 Mar 2016
Here’s a quick growth conundrum, to get you thinking.
Consider two countries at the close of World War II — Germany and Japan. At that point, they’ve both suffered heavy population losses. Both countries have had their infrastructure devastated. So logically, the losing countries should’ve been in a post-war economic quagmire.
So why wasn’t that the case at all?
Following WWII, Germany and Japan were growing twice, sometimes three times, the rate of the winning countries, such as the United States.
Similarly, think of this quandary: in past videos, we explained to you that one of the keys to economic growth is a country’s institutions. With that in mind, think of China’s growth rate. China’s been growing at a breakneck pace — reported at 7 to 10% per year.
On the other hand, countries like the United States, Canada, and France have been growing at about 2% per year. Aside from their advantages in physical and human capital, there’s no question that the institutions in these countries are better than those in China.
So, just as we said about Germany and Japan — why the growth?
To answer that, we turn to today’s video on the Solow model of economic growth.
The Solow model was named after Robert Solow, the 1987 winner of the Nobel Prize in Economics. Among other things, the Solow model helps us understand the nuances and dynamics of growth. The model also lets us distinguish between two types of growth: catching up growth and cutting edge growth. As you’ll soon see, a country can grow much faster when it’s catching up, as opposed to when it’s already growing at the cutting edge.
That said, this video will allow you to see a simplified version of the model. It’ll describe growth as a function of a few specific variables: labor, education, physical capital, and ideas.
So watch this new installment, get your feet wet with the Solow model, and next time, we’ll drill down into one of its variables: physical capital.
Helpful links:
Puzzle of Growth: http://bit.ly/1T5yq18
Importance of Institutions: http://bit.ly/25kbzne
Rise and Fall of the Chinese Economy: http://bit.ly/1SfRpDL
April 17, 2017
Office Hours: Rule of 70
Published on 23 Feb 2016
One of the of the practice questions from our “Growth Rates Are Crucial” video asks you to compare real GDP per capita for two countries that start at the same place, but grow at different rates. It’s a little tricky:
Suppose two countries start with the same real GDP per capita, but country A is growing at 2% per year and country B is growing at 3% per year. After 140 years, country B will have a real GDP per capita that is roughly ________ times higher than country A. (Hint- you may want to review the “Rule of 70” to answer this question.)
We asked our Instructional Designer, Mary Clare Peate, to hold virtual “office hours” to guide you through how to solve this problem. Join her as she discusses your questions!
April 7, 2017
Growth Rates Are Crucial
Published on 12 Jan 2016
In the first video in this section on The Wealth of Nations and Economic Growth, you learned a basic fact of economic wealth — that countries can vary widely in standard of living. Specifically, you learned how variations in real GDP per capita can set countries leagues apart from one another.
Today, we’ll continue on that road of differences, and ask yet another question.
How can we explain wealth disparities between countries?
The answer? Growth rates.
And in this video, you’ll learn all about the ins-and-outs of measuring growth rates.
For one, you’ll learn how to visualize growth properly — examining growth in real GDP per capita on a ratio scale.
Then, here comes the fun part: you’ll also take a dive into the growth of the US economy over time. It’s a little bit like time travel. You’ll transport yourself to different periods in the country’s economic history: 1845, 1880, the Roaring Twenties, and much more.
As you transport yourself to those times, you’ll also see how the economies of other countries stack up in comparison. You’ll see why the Indian economy now is like a trip back to the US of 1880. You’ll see why China today is like the America of the Jazz Age. (You’ll even see why living in Italy today is related to a time when Atari was popular in the US!)
In keeping with our theme, though, we won’t just offer you a trip through ages past.
Because by the end of this video, you’ll also have the answer to one vital question: if the US had grown at an even higher rate, where would we be by now?
The magnitude of the answer will surprise you, we’re sure.
But then, that surprise is in the video. So, go on and watch, and we’ll see you on the other side.
March 20, 2017
Basic Facts of Wealth
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 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.
