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- [Alex] Is Real GDP per capita
a good measure of the standard of living?

People tell me all the time,

"You economists,
you're too materialistic."

Doesn't Real GDP per capita
just measure the things we buy?

What about our health,
our happiness, education?

Well, Real GDP per capita --
it's not a perfect measure.

But I want to show you why it's probably

the best single measure of the average
standard of living in a country.

And that's not because material goods
are the most important goods.

It's because Real GDP per capita

is correlated with many
of the other things that we care about.

Let's start with life expectancy.

Here we show Real GDP per capita
along the horizontal axis

and life expectancy
along the vertical axis.

As you can see,
there's a positive correlation.

Countries that have
a higher GDP per capita

also have a higher life expectancy.

Perhaps that's not too surprising.

Let's take a look at happiness.
Maybe this is a more surprising fact.

This chart shows GDP per capita
on the horizontal axis

and now a measure of happiness
on the vertical axis.

Again, we see a positive correlation.

Countries with a higher
Real GDP per capita

also tend to have
happier people, on average.

Here's a data set from the United Nations.

It's called the Human Development Index.

It combines measures of life expectancy,
education, and standard of living.

Overall you can see, in general,
as GDP per capita increases,

so does human development --
at least as measured by this index.

The basic story -- it's pretty simple.
When we have more goods and services,

we can usually afford
more of the other good things in life.

So the good things in life --
they tend to go together.

However, GDP per capita 
is far from perfect.

Here's one problem.

GDP per capita misses
the distribution of income.

For example, let's compare
the Real GDP per capita of Nigeria,

Pakistan, and Honduras.

It's actually pretty similar.

So you might think 
that all three countries

have similar living standards.

And yet, in Nigeria,

about 80% of the population
lives on less than $2 a day.

In Pakistan, it's only 60%

In Honduras, it's only 33%.

How can the number of people
living in abject poverty be so different,

when Real GDP per capita
is about the same?

The reason is that income in Nigeria
is much more unequally distributed

than in Pakistan or Honduras.

Nigeria has many poor people,
but also some very rich people.

So average income --

it's about the same in Nigeria,
Pakistan, or Honduras,

even though there are
more poor people in Nigeria.

Over time, however, 
growth in Real GDP per capita,

whether in Nigeria, 
Pakistan, or Honduras,

usually does indicate growth
in everyone's incomes,

including the incomes of the very poor.

So this graph shows growth
in per capita incomes

along the horizontal axis,

with growth in the incomes
of the poorest 20% on the vertical axis.

Once again you see, as average
per capita income increases,

you also see increases
in income of the very poor.

Overall, Real GDP and Real GDP per capita
have proven to be useful measures

for comparing the standard of living
of two different countries,

or for comparing the same country
at different points in time.

Okay. So now that you know
that Real GDP per capita --

it's a good measure
of the standard of living,

we get to the really crucial question.

How do we increase the standard of living?
How do we grow an economy?

How do we increase Real GDP per capita?

That is a big question,
the big question of development.

We'll be tackling it
in a number of future videos.

But before you go, take a moment
to let us know how we're doing.

What do you think of the videos?
How can we improve?

Drop us an email or leave us
some feedback on our website.

Thanks.

- [Narrator] If you want to test yourself,
click "Practice Questions."

Or, if you're ready to move on,
you can click "Go to the Next Video."

You can also visit MRUniversity.com

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