Public Policy Modeling Examples of Causal Loop Diagrams Tuesday, June 12, 2018 Hun Myoung Park, Ph.D. Public Management & Policy Analysis Program Graduate School of International Relations

Software for CLD Vensim (https://vensim.com/) iThink (http://www.iseesystems.com/) STELLA (http://www.iseesystems.com/) Powersim (http://www.powersim.com/) Anylogic (http://www.anylogic.com/) You may also try LibreOffice Draw or Microsoft Visio 2

Illustration of Causal Maps Impact of DDT on Malaria Economy and population Electrical energy system Corruption system Common pool resources system Premarital Teenage Pregnancy & Motherhood

Impact of DDT on Malaria 1

Impact of DDT on Malaria 2

Impact of DDT on Malaria 3

http://butane.chem.uiuc.edu/pshapley/Environmental/L37/1.html

Impact of DDT on Malaria 5

Impact of DDT on Malaria 6 Loop 1 (Balancing): DDT Use→Mosquito →Disease Loop 2 (Reinforcing): DDT Use→DDT in Breast Milk→Disease Loop 3 (Reinforcing): DDT Use→DDT in Gecko→Cat→Rat→Disease Loop 4 (Reinforcing): DDT Use→Wasp →Caterpillar→Thatch Roof→Disease

Economy and Population 1 Sherwood (2002, pp.241-262)

Economy and Population 2 Sherwood (2002, pp.241-262)

Economy and Population 3 Sherwood (2002, pp.241-262)

Economy and Population 4 Sherwood (2002, pp.241-262)

Economy and Population 5 Sherwood (2002, pp.241-262)

Economy and Population 6

Economy and Population 7

Electrical Energy System

Corruption System

Common Pool Resources

Premarital Teenage Pregnancy & Motherhood 20

Opium Market System

References Anderson, Virginia, and Lauren Johnson. 1997. Systems Thinking Basics: From Concepts to Causal Loops. Waltham, MA: Pegasus Communications. Sherwood, Dennis. 2002. Seeing the Forest for the Trees: A Manager. London: Nicholas Brealey Pub. Weick, Karl E. 1979. The Social Psychology of Organizing. 2nd ed. Reading, MA: Addison-Wesley Pub. Co.