Last Class All dynamics are driven by- Accumulation processes Feedback processes Reinforcing loops --loops with all positive or an even number of negative causal links ▣ Balancing loops--loops with an odd number of negative causal links 上游充通大￥ Shanghai Jiao Tong University+ - Last Class All dynamics are driven by –  Accumulation processes  Feedback processes  Reinforcing loops -- loops with all positive or an even number of negative causal links  Balancing loops -- loops with an odd number of negative causal links