This paper examines fundamental microeconomic and macroeconomic concepts through three applied scenarios. The first traces the coffee market through cycles of overproduction, premium pricing, and weather-induced supply shocks. The second contrasts microeconomic and macroeconomic determinants of demand and supply, then classifies ten real-world events — including Hurricane Katrina, microchip development, tariff increases, and inflation — as either micro or macroeconomic issues. The third scenario discusses how foreign investment, particularly official flows and commercial loans, can stimulate aggregate demand, aggregate supply, and GDP growth in developing economies. Together, the scenarios illustrate how price signals, consumer behavior, government policy, and external shocks interact to move markets toward or away from equilibrium.
In the first phase, the price of coffee increased, luring producers into the market. This caused supply to move up the curve. The increased supply, combined with unchanged demand, led to overproduction. The coffee market had been at an equilibrium price of $3.25; the rise in price caused supply to increase and demand to fall, resulting in overproduction equal to Q3–Q2.
As demand remained unchanged, overproduction caused prices to begin falling. Suppliers started cutting back supply, and the price dropped below the equilibrium level. During this period, coffee houses began opening in high-income areas and started charging a premium for coffee. This development brought the market back toward equilibrium, but new firms had already begun entering the market. These firms enjoyed abnormal profits because they charged prices above the prevailing market price. Demand also increased as a result of these new establishments, since high-income consumers were attracted to coffee houses because of their quality offerings.
The market returned to equilibrium at a price lower than the previous one, though the quantity traded increased. With prices continually falling and demand relatively inelastic among high-income consumers, gourmet coffee houses were the most-benefited party in this scenario. As the price of coffee fell, these retailers earned greater and greater profits. The high retail price had little effect on demand because of consumer preferences and high incomes. Accordingly, gourmet coffee houses were able to charge increasing premiums. Because these establishments targeted high-income groups, both supply and demand remained relatively inelastic, and broader market fluctuations did not affect them considerably.
Midway through the decade, adverse weather conditions caused the supply of coffee to fall. This led to a shortage and rising prices, ending the comfortable profit margins that coffee houses had enjoyed during the low-price period. The difference between the retail price and the market price narrowed, reducing profits. The supply reduction produced a new equilibrium characterized by a higher price and a lower quantity traded.
Microeconomics describes demand as the need for a good or service at a given price, and supply as the availability or production of that good or service at that price. Macroeconomics, by contrast, describes aggregate demand as the total demand for goods and services in an economy at a given time and price level, while aggregate supply refers to the total amount of goods and services that an economy plans to produce and sell over a given period (Parker, 2010).
Many factors affect the demand and supply of a product; these factors are called determinants. The determinants of demand relate to consumers and their preferences. The first is income: the higher a person's income, the greater their demand for a product. The prices of substitutes and complements also play an important role — the price of complements has a direct effect on demand, while the price of substitutes has an inverse relationship with demand. Additionally, tastes and preferences matter, as do expectations about future income, product availability, and prices (Lipsey and Harbury, 1992).
The primary determinant of supply is the cost of production: lower production costs allow producers to supply more. The number of sellers in the market also matters — greater competition generally increases total supply. Furthermore, if sellers expect prices to fall in the near future, they will typically increase supply in the short term to maximize available profits (The Determinants, n.d.).
Because aggregate demand and supply relate to the whole economy, their determinants differ from those at the individual market level. Consumer spending — the total value of goods consumed across an economy — is the primary determinant of aggregate demand. Investment spending also matters, as it directly drives demand for capital goods. Government spending on infrastructure increases demand for related products, and net exports further affect aggregate demand (Sloman, 2006).
Aggregate supply is influenced by the price of inputs: lower input prices tend to increase supply. Productivity is another key factor — low productivity reduces supply. Finally, the legal and political environment matters; when governments introduce favorable policies and laws, aggregate supply tends to expand (Sloman, 2006).
All of the factors described above cause demand or supply curves to shift. Movement along a curve is caused by changes in price in the case of normal demand and supply, and by changes in the price level in the case of aggregate demand and supply (Sloman, 2006).
Hurricane Katrina: After Hurricane Katrina, the supply of fish fell as fishermen were reluctant to venture out to sea. The reduced supply caused a shortage, and the price of fish increased. This is a microeconomic issue, as only the fish market is affected. The supply curve shifts leftward from S1 to S2.
Development of the Microchip: Following the invention of the microchip, consumers became attracted to computers, representing a new dimension in computing. As demand increased, the demand curve shifted rightward, causing both equilibrium price and quantity to rise. This is a microeconomic issue.
Raised Tariff on Imported Cheese: An increase in tariffs on imported cheese causes demand for domestically produced cheese to increase. The demand curve shifts rightward, forming a new equilibrium. This is a macroeconomic issue because net exports are affected, which in turn positively influences aggregate demand.
Trendy Polyester Suits: As polyester suits become fashionable again, consumer preferences shift and demand for these suits increases. The demand curve shifts rightward, raising the equilibrium price. This is a microeconomic issue.
Increased Demand for Websites: The rise in demand for website development services causes a rightward shift in the demand curve, establishing a new equilibrium with a higher price. This is a microeconomic issue.
Red Wine Lowering Cholesterol: A report indicating that red wine reduces cholesterol would attract health-conscious consumers to the product. Demand for red wine increases, shifting the curve rightward and raising the equilibrium price. This is a microeconomic issue.
"Ten events classified as micro or macroeconomic with graph analysis"
Agosin, M., and Mayer, R. (2000). World Investment Report. [Report] Geneva: UNCTAD, pp. 1–14.
Lipsey, R., and Harbury, C. (1992). First Principles of Economics. London: Weidenfeld and Nicolson.
Parker, J. (2010). Economics [Course Coursebook]. [e-book] pp. 1–22.
Sloman, J. (2006). Economics. Harlow: Financial Times Prentice Hall.
Unknown. (n.d.). The Determinants of Demand and Supply. [Online] Retrieved from:
wiseGEEK (2003). What Are the Different Types of Foreign Investment? [Online] Retrieved from: http://www.wisegeek.com/what-are-the-different-types-of-foreign-investment.htm.
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