User contributions
- 10:22, 1 April 2013 (diff | hist) . . (+40) . . 1193: Externalities (→Explanation: added)
- 10:16, 1 April 2013 (diff | hist) . . (+94) . . 1193: Externalities (→Second Panel: add for apple)
- 10:14, 1 April 2013 (diff | hist) . . (0) . . 1193: Externalities (→Second Panel: spelling)
- 10:14, 1 April 2013 (diff | hist) . . (+105) . . 1193: Externalities (→Second Panel: add example)
- 09:15, 1 April 2013 (diff | hist) . . (+19) . . 1193: Externalities (→Explanation: new wikipedia article is being used.)
- 09:50, 26 March 2013 (diff | hist) . . (+1) . . 326: Effect an Effect (→Explanation: spelling)