00:01
So here we're talking about nash equilibriums.
00:02
The first thing we should know is what it means.
00:05
A nash equilibrium is when there is no incentive to deviate, that is to change your behavior.
00:13
That whatever strategy you're playing, you can't do any better by changing your behavior.
00:19
So here we have two firms, and the way that i always like to do this is draw them in different colors, we have low and high, we have low, we have high, and now we have payoffs.
00:32
We have payoffs that are 25 -15 and 40 -30.
00:38
Looking just at the reds, you can see that this row is better.
00:46
It's what we would call a dominant strategy.
00:48
If the red player plays low, they always do better than if they play high.
00:54
Similarly, if we look at the blues, we have 25 -5, but we have x -y.
01:03
But we know that low is always going to be played by red.
01:08
And it doesn't matter what x and y are, these are irrelevant because high is never going to be played.
01:20
Only low is going to be played.
01:22
So if low is the only thing that's going to be played, then blue will know that they should play low as well...