1. Leontief Economic Models
Zach and Andrew

2. Closed Models- Example 1

3. Closed Models- Example 1

4. Closed Models- Example 1

5. Closed Models- Example 1

6. Closed Models- Example 2

7. Closed Models- Theorem
Let E be an exchange matrix such that for some positive integer m all the entries of E^m are positive. Then there is exactly one linearly independent solution of (I-E)p = 0, and it may be chosen so that all its entries are positive.

8. Open Models- Explanation

9. Open Models- Explanation

10. Open Models- Example 1

11. Open Models- Productivity

12. Open Models- Productivity