One method for studying opportunity cost is to think in terms of

In short: Opportunity cost is a foregone benefit with a choice. Still from this perspective of economics and business, other real examples would be the decisions between investment or personal expense. When one chooses to make a leisure trip, one is willing to invest that money), when one chooses to invest, one gives up the trip. Leaving from the individual perspective and passing to the social, we must think of the opportunity cost as the choice of the allocation of available resources .

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .