# deal (transaction)

a change where one thing gives something to another thing and receives something back

- Computed level: L14 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: economics  ·  Arena: social

## Emergence
**Emerges from:** [change](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-change.process), [give](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-give.transfer), [receive](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-receive.communication), [back](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-back.spatial)

**Through:** One thing gives something to another and receives something back, forming a reciprocal exchange.

**Novel properties:**
- reciprocity
- two-way flow
- spatial reversibility

## Examples
- In 2019, Amazon paid $970 million to acquire the MGM film library and received full rights to its 4,000-title catalog. *(economics)*
- The 1972 SALT I treaty saw the U.S. and USSR exchange limits on missile launchers for mutual verification access. *(institutions)*
- Photosystem II in spinach chloroplasts splits water molecules, releasing electrons and receiving photons at 680 nm. *(biology)*

---
*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-deal.transaction*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-deal.transaction.json*  
*Every definition provably resolves to space, time, energy and pattern.*