So we'll start out with two examples of randomized controlled experiments.

And you can do the same randomized, controlled trial for social policy.

So what we did is we did a randomized, controlled trial in 134 villages in Udaipur Districts.

But remember, go back to lecture one, where we made the distinction between randomized controlled experiments and observational studies.

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This was a randomized trial.

So experimentalists use randomized experiments.

Controlled property

And in the 20th century, randomized, controlled trials have revolutionized medicine by allowing us to distinguish between drugs that work and drugs that don't work.

He's easily controlled.

Controlled by'Printout Mode '

And climate controlled.

So, it's controlled.

You are controlled.

Controlled? Free man?

Short controlled bursts.

Pollution can be controlled.

She controlled her tears.

Units of controlled property

They are more controlled.

It's called thought controlled computing.

So the motion is controlled.

It is not remote controlled.

It's controlled by the Hutts.

Similarly, using a randomized control trial in rural Pakistan,

learning. Randomized decision trees, another technique from machine learning.

Last segment we talked about the power of randomized experiments.

like, and it almost looks like a randomized experiment, right?

It was a randomized control study published in The Lancet.

So in this first segment, let's talk about randomized experiments.

Now we know they are effective because of randomized experiments.

MIDI controlled, software synthesizer using JACK

The puppets are controlled by wires.

Whoever controlled grain supplies wielded power.

That was not a controlled descent.

I'm not even telling you the story because I think we should be running more carefully controlled randomized trials in all aspects of public policy, although I think that would also be completely awesome.

Is again to drive home the power of those randomized experiments.

Controlled Access Zone No entry without permission.

It does an equilibrium glide. Highly controlled.

So we do random assignment, placebo controlled,

So that's why these observational studies aren't as powerful as randomized experiments.

The first, I'll give you a couple of examples of randomized experiments.

The government of the Inca Empire controlled everything.

They controlled a fifth part of the territory.

The man controlled the country for fifty years.