Makro Ekonomi - Keseimbangan Perekonomian 3 Sektor (Contoh Soal dan Pembahasannya)

Summary

In this video, the instructor discusses the concept of macroeconomic equilibrium in a three-sector economy, focusing on consumption, investment, and government expenditure. They explain how this equilibrium can be used to measure a country's national income, particularly in closed economies like North Korea, contrasting it with open economies like Indonesia and the U.S. Through a practical example from Sadono Sukirno's book, the instructor illustrates how to calculate disposable income and aggregate expenditure, ultimately revealing the implications of a deflationary gap in national income at full employment.

Takeaways

• 📊 The focus of the lesson is on macroeconomics, specifically the equilibrium of the economy in three sectors.
• 🏗️ The three sectors discussed are consumption, investment, and government expenditure.
• 🌍 This three-sector equilibrium can be applied in both open and closed economies.
• 🚪 The model differs from the four-sector model, which includes exports and imports.
• 💰 The equilibrium is represented by savings (leakage) and investments (injections).
• 📖 The example used is based on Sadono Sukirno's textbook on economics.
• 🧮 The consumption function is expressed as C = 100 + 0.75Yd, with a tax of 0.2Y.
• 💼 Full employment national income is set at 1400 in the given example.
• 📉 The deflation gap is calculated as the difference between potential national income and actual income.
• 🔍 The lesson concludes with a request for viewers to comment if they want the presentation and to subscribe for more content.

Q & A

What is the main focus of today's lesson?

The lesson focuses on macroeconomics, specifically the equilibrium of the economy in three sectors.

What are the three sectors involved in the three-sector economic equilibrium?

The three sectors are consumption, investment, and government expenditure.

How does the three-sector equilibrium differ from the four-sector model?

The three-sector model does not include exports and imports, which are part of the four-sector model.

Can the three-sector model be applied to economies that are not open?

Yes, it can be applied to closed economies, such as North Korea.

What is meant by 'leakages' and 'injections' in the context of the three-sector equilibrium?

In this context, leakages refer to savings, while injections refer to investments and government expenditure.

What is the consumption equation provided in the lesson?

The consumption equation is C = 100 + 0.75Yd, where Yd is disposable income.

What is the significance of the national income level at full employment in the lesson?

The national income at full employment is used to calculate the deflation gap in the economy.

How is the deflation gap defined in this lesson?

The deflation gap is defined as the amount of aggregate expenditure shortfall needed to achieve full employment consumption.

What is the full employment national income stated in the transcript?

The full employment national income stated is 1400.

What was the calculated national income for the three-sector economy in this lesson?

The calculated national income for the three-sector economy was 1340.