Gravity Model
CES generates gravity: trade flow proportional to size / distance, with curvature corrections.
Impact Score
Score Reasoning
- Importance
- CES derivation of the gravity equation is a well-connected application demonstrating framework breadth, but the gravity-CES link is well-established in trade theory.
- Novelty
- Gravity from CES is a known result (Anderson-van Wincoop 2003). The curvature corrections add modest novelty.
- Quality
- Clean derivation with good cross-links to trade-unification and network-scaling. Well-written.