Step 1: Identify determinants of goodwill.
Goodwill is influenced by: - Business characteristics (e.g., demand stability, profitability). - Geographic position (a prime location enhances goodwill). - Market conditions (a favorable market boosts goodwill). - Internal management effectiveness.
Step 2: Evaluate the provided choices.
- Nature of Business → significant determinant.
- Location → significant determinant.
- Market Situation → significant determinant.
- Management efficiency of external, non-competing businesses → immaterial, as goodwill pertains to the management of the business itself, not unrelated entities.
Step 3: Finalize.
Consequently, option 4 is not a primary factor.
Final Answer: \[\boxed{\text{Efficiency of Management of non-competitive firms}}\]