factor substitution

In economics, "factors of production" refers to the inputs necessary to create goods and services. These are typically categorized into four groups: land, labor, capital, and entrepreneurship.1

• Land: Natural resources whose supply is limited and cannot be increased through production.
• Labor: Human effort, both manual and mental, used in production.
• Capital: Produced goods used in the production of other goods and services, such as machinery and factories.
• Entrepreneurship: The skill and risk-taking involved in organizing the other factors of production.

The concept of "factor substitution" relates to the idea that one factor of production can be replaced by another. The elasticity of substitution measures how responsive one factor is to changes in another, indicating the degree to which they can be interchanged in the production process. Production functions describe the relationship between these factors and the output they produce.23