- Insight: Once we own things, we value them more.
- Insight: The endowment effect can mean that objects have a claim on you, we perceieve them to be more important than they are.
- Insight: We can find it difficult to give up that which we own.
- Insight: Accumulation is costly at any price.
- Insight: Physical items that we own consume time, space and energy.
- Principle: We cautious about the things you acquire, including free things.