In the long run, all production factors are____________

1. Analyze the question The question asks about the nature of production factors (land, labour, capital, entrepreneur) in the long run.

2. Explain the concept In economics, time periods are defined by how flexible the factors of production are:

• Short run: At least one factor (usually capital or land) is fixed. Output can only be changed by varying other factors, such as labour or raw materials.
• Long run: The period is long enough for the firm to change all factors of production. Factory size, machinery, and labour can all be adjusted, and firms can enter or leave the industry.

3. Step-by-step solution

• Fixed factors exist only in the short run, so B (fixed) is wrong.
• "Semi-fixed" (D) and "semi-variable" (C) are not standard terms for classifying factors of production in this context. They describe costs, not the long-run status of factors.
• In the long run, the firm has enough time to adjust every input, so every factor is variable.

4. Answer The correct option is A. variable.

5. Exam tip Remember: "Short run = some fixed; Long run = all variable." In the long run, there is no such thing as a fixed factor. If you see "long run" in a JAMB Economics question, think "everything can change."