Answer:
Part1:
A. Birth rates in the United States decline: diapers
- demand decreases, demand curve shifts to the left
B. The government provides subsidies to ethanol producers: ethanol
- supply increases, supply curve shifts to the right
C. Starbucks coffee drinkers suffer due to a small coffee harvest: Starbucks coffee
- supply decreases, supply curve shifts to the left
D. Consumer incomes decrease: public transportation
- demand decreases, demand curve shifts to the left
Part2:
A. The price of beer increases: Solo cups
- demand decreases, quantity demanded will lower following the demand curve
B. Henry Ford develops assembly-line production: automobiles
- supply increases, supply curve shifts to the right
C. Natural gas producers are making large economic losses: natural gas
- supply decreases, supply curve shifts to the left
D. The price of PlayStation increases: Xbox
- demand for Xbox decreases, quantity demanded will lower following the demand curve