1. Technological change: Changes in products or the ways products are made resulting from research into new ideas.
Examples: Mobile phones with cameras.
2. Pressure group: Groups of people who share a common interest and take action to achieve the changes they are seeking.
3. Private costs: The costs to producers and consumers of an economic activity.
4. External costs: The cost of an economic activity paid for by the rest of society, not the producers/consumers
5. External benefits: The benefits of an economic activity received by the rest of society other than producers/consumers.
6. Private benefits: The benefits of an economic activity to producers/consumers.
Cost benefit analysis: An analysis usually carried out the government, into the overall costs and benefits of a large new project
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