# 🎓 Egypt Education System Dynamics Model (EESDM)
> A multi-sector system dynamics simulation modeling the long-term impact of education expenditure policies on pre-university outcomes in Egypt — built in Stella Architect and calibrated against official CAPMAS national data.
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## 🧩 The Problem
Egypt's pre-university education system faces structural challenges that cannot be fully understood through static or short-term analysis:
- Population growth outpacing infrastructure and teacher capacity
- Inconsistent public expenditure allocation across education levels
- Feedback loops between enrollment rates, dropout, and economic outcomes
- Policy decisions made without dynamic long-term impact assessment
Traditional econometric models capture correlations but miss the **feedback dynamics** and **time delays** inherent in education systems. This model addresses that gap through a **system dynamics approach**.
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## 🔬 Methodology
The model is built using **System Dynamics** — a simulation methodology designed for complex systems with feedback loops, stocks, flows, and nonlinear relationships over time.
### Modeling Tool
> **Stella Architect** — industry-standard system dynamics platform
### Calibration Data
> **CAPMAS** (Central Agency for Public Mobilization and Statistics) — Egypt's official national statistics authority
### Model Structure — 4 Interconnected Sectors
```
┌─────────────────────────────────────────────────────────┐
│ EESDM v15 │
├──────────────┬──────────────┬──────────────┬────────────┤
│ M0 │ M1 │ M2 │ M3 ... │
│ Population │ Finance │ Pre-Primary │ (planned) │
│ Dynamics │ & Budget │ Education │ │
└──────────────┴──────────────┴──────────────┴────────────┘
```
| Sector | Description |
|--------|-------------|
| **M0 — Population** | Age-cohort population dynamics, birth rates, survival rates, and school-age population project …