Positive externality refers to The benefit that enjoyed by a third party when the first and second party are conducting a transaction.
When you receive a vaccines, you prevent yourself from becoming a host that could contaminate other people from getting the virus. In the example above, you and your children are the first and second party. And other children are the third party.
Positive externality - <span>a benefit that is enjoyed by a third-party as a result of an economic transaction. Third-parties include any individual, organisation, property owner, or resource that is indirectly affected.</span>
Hernando de Soto’s men went to the town from the camp and looked for maize (corn). The soldiers were not satisfied with what they got, so instead, they went rummaging around and searched the houses while seizing what they found. This made the Indians “excited” (got them upset).
The primary issue that created tension between FDR and southern democrats was that many of FDR's policies were spending tax money on poor black people, which many racist people in the South opposed.