00:01
Here we're taking a look at externalities, and we're given an example in which we have two colleagues named betty and anna.
00:07
They are carpooling together from pittsburgh, from their office.
00:12
And what we have here is that betty smokes and she receives $40 marginal benefit per day from smoking.
00:17
And each pack of her cigarettes cost her $6.
00:20
On the other hand, anna does not smoke and she gets $50 marginal benefit from a smoke -free environment.
00:26
So we want to determine what our different outcomes would be depending on who is driving.
00:30
So let's first take a look at if betty is driving.
00:33
So remembering that betty is the one that smokes, what we can see here is that she has her marginal benefit, which is equal to $40, and her cost to do that, so her cost of cigarettes, which we could maybe consider her marginal cost would be $6.
00:48
And then anna, however, gets $50 from not smoking from being in an environment which is smoke -free.
00:56
So what might happen if betty is driving? well, in this case, anna may want to pay betty not not to smoke.
01:03
And anna would have to pay betty her marginal benefit minus marginal cost...