Quality standards influence positive outcomes because they provide a minimum level or at least a certain level that is required of goods and services that are provided for the people. Through this the probability that positive outcomes will be received are then increased :)
It was said that the Roman Catholic Church have more influence on the Southern Europe compared to other parts of Europe because the leader of the church, which is a Pope, was described to be very influential to the countries located in the Southern Europe.
In 1849 gold was discover in California so everyone migrated there. This transformed the landscape and population of California.
Hope this helps.
Basically stop the importation of slaves from Africa or from the West Indies. There was some smuggling of slaves. After that, all the way up to the Civil War, the ban was not totally enforced, but it certainly ended what had been before then an open, legal and fairly large slave trade.
An externality associated with a market can produce negative costs and positive benefits, both in production and consumption.
