Fundamentals of Macroeconomics: Production and Income Flow
1. Macroeconomics Fundamentals
Macroeconomics addresses a country's production, economic growth achieved in a year, and unemployment. This field focuses on the situation of the national and international economy. It utilizes the concept of value added. Macroeconomics was developed by John Maynard Keynes in the 20th century. Economists use specific variables to describe the state of the economy; these are called macro variables. In Spain, the measurement of these magnitudes is performed by the INE, which develops the national accounting system.
2. Circular Flow of Income
This signifies the constant exchange between companies and families, creating a flow of goods and services along with their corresponding payments. There are two types of flows:
- Real Flow: Families provide factors of production to companies, and companies produce goods and services sold to families.
- Cash Flow: Companies remunerate families for the factors of production used, and they receive payments from families for the goods and services provided.
3. National Product
The total of all goods and services generated by companies in a country is known as the National Product.
3.1 Measuring and Components of GNP
GNP (Gross National Product) is the value of all final goods and services that firms within a country obtain during a specific period, usually one year. It can be determined in two ways:
- Measuring what is actually produced: final goods and services.
- Accounting for the costs incurred by economic actors.
a) The Production Perspective
The national product can be calculated by summing the final goods and services a country produces in a year, or by adding the value added generated at each production phase.
b) Expenditure Perspective
The national product of a country can also be obtained by adding up the expenditures made by all agents as a consequence of utilizing the goods and services produced by companies. The goods and services produced within a country can have four destinations:
- Private Consumption (C)
- Investment (I)
- Public Consumption (CP)
- Net Exports (X - M) (Exports minus Imports)
NATIONAL PRODUCT = C + I + CP + (X - M)
3.2 Aggregate Supply and Macroeconomic Equilibrium
Aggregate Supply is the total amount of goods and services that companies in a country are willing to produce and sell during a given period, considering existing prices. Equilibrium is achieved when, at a specific price level, aggregate supply meets demand (producers and consumers). When this equilibrium position is reached, consumers and producers have no incentive to modify their behavior.