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| Time Paths |
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| Actual Data | |
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| Stocks and Flows |
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| Feedback | |
| Nonlinearities and Limits | |
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| Problems and symptoms are separated by time and space | |
| Counterintuitive behavior | |
| Better before worse or worse before better | |
| Policy resistance | |
| Unpredictability | |
| Disequilibrium | |