Answer: are present in many older, pre-internet businesses.

## Explanation **Correct Answer: C** - Network effects are present in many older, pre-internet businesses. **Detailed Analysis:** 1. **Network effects** refer to the phenomenon where the value of a product or service increases as more people use it. This creates a positive feedback loop where increased usage attracts more users. 2. **Option A is incorrect**: Network effects actually **raise** barriers to entry rather than lower them. When a company benefits from strong network effects, new competitors face significant challenges because they need to attract a critical mass of users to make their service valuable. Established networks have a competitive advantage that's difficult to overcome. 3. **Option B is incorrect**: Network effects are **not** created only when crowd sourcing is used. While crowd sourcing can create network effects, network effects exist in many contexts without crowd sourcing. Examples include: - Telecommunications networks (telephones) - Social media platforms - Operating systems - Credit card networks - Marketplaces (eBay, Amazon) 4. **Option C is correct**: Network effects have existed long before the internet. Classic examples include: - **Telephone networks**: The more people had telephones, the more valuable the telephone network became - **Fax machines**: Their value increased as more businesses adopted them - **Credit card networks**: More merchants accepting a card makes it more valuable to consumers, and more consumers using it makes it more valuable to merchants - **Railroad gauges**: Standardization created network effects - **Language**: The more people speak a language, the more valuable it becomes to learn **Key Takeaway**: Network effects are a fundamental economic concept that predates the internet and digital technology. They create powerful competitive advantages and high barriers to entry in various industries, both old and new.

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