What Is Short-Term Aggregate Supply And How Does It Differ

What Is Short Term Aggregate Supply And How Does It Differ From Long T

Short-term aggregate supply (SAS) refers to the total quantity of goods and services that an economy is willing and able to produce at different price levels, assuming that at least some input prices are sticky or fixed. In this period, producers respond to changes in price levels by increasing or decreasing output, primarily because of the fixed or inflexible costs of production that do not immediately adjust to market conditions. Consequently, as prices rise, firms are generally motivated to supply more, leading to an upward-sloping supply curve in the short term.

In contrast, long-term aggregate supply (LAS) represents the total output an economy can produce when all inputs, including wages and prices of capital, are fully flexible and adjustable to economic conditions. Over the long run, resource prices and production costs can change, allowing the economy to reach its maximum sustainable output or potential GDP. The long-run aggregate supply curve is typically depicted as vertical, indicating that the economy's capacity is determined by factors such as technological progress, capital stock, and labor force size, regardless of the price level.

Differences Between Short-Term and Long-Term Aggregate Supply

One of the fundamental differences between short-term and long-term aggregate supply relates to the flexibility of input prices. In the short term, some prices are sticky or inflexible—for example, wages and input costs—resulting in a positive slope for the SAS curve. This means that when aggregate demand increases, output tends to increase, but only temporarily, before prices and wages adjust.

On the other hand, in the long term, all prices are flexible, and firms operate at their maximum capacity. The LAS curve is vertical because, in the long run, output is determined solely by productive capacity factors like technology, capital, and labor. Changes in demand do not influence long-term output, only the price level. Therefore, policies aimed at increasing long-term output focus on improving these capacity factors.

Strategies to Increase Long-Term Aggregate Supply

Economies seeking to boost long-term aggregate supply should implement policies that enhance productive capacity and technological innovation. Investment in education and workforce training increases the quality and productivity of labor, thereby expanding potential output. Technological advancements and innovation can lead to more efficient production processes, effectively increasing supply.

Reducing unemployment is another critical strategy since a lower unemployment rate implies a larger, more efficient labor force. Policies that promote full employment include labor market reforms, better workforce education, and skills development.

Encouraging private investment through favorable tax policies and deregulation can stimulate entrepreneurship and innovation, resulting in increased supply capacity. Privatization of state-owned enterprises can also contribute to efficiency and productivity growth. Moreover, infrastructure development—such as transportation, communication, and energy systems—facilitates smoother business operations, further expanding long-term productive capacity.

In conclusion, understanding the distinctions between short-term and long-term aggregate supply is essential for crafting effective economic policies. While the short-term supply responds to immediate changes and is influenced by sticky prices and costs, the long-term supply depends on structural factors that can be enhanced through strategic reforms and investments. Future economic growth depends significantly on policies that promote technological progress, resource allocation, and increased efficiency in production.

References

• Khan, H. (2012). Economics: Principles, Problems, and Policies. McGraw-Hill Education.
• Mankiw, N. G. (2014). Principles of Economics (7th edition). Cengage Learning.
• Blanchard, O., & Johnson, D. R. (2013). Macroeconomics (6th edition). Pearson.
• Samuelson, P. A., & Nordhaus, W. D. (2010). Economics (19th edition). McGraw-Hill Education.
• Krugman, P., & Wells, R. (2018). Macroeconomics (5th edition). Worth Publishers.
• Friedman, M. (2002). Economic Freedom and Beyond. Nobel Lecture.
• Barro, R. J. (1991). Economic Growth in a Cross Section of Countries. The Quarterly Journal of Economics.
• Solow, R. M. (1956). A Contribution to the Theory of Economic Growth. The Quarterly Journal of Economics.
• Romer, D. (2012). Advanced Macroeconomics (4th edition). McGraw-Hill Education.
• World Bank. (2020). World Development Report 2020: Trading for Development in the Age of Global Value Chains. World Bank Publications.