➕ Defines "egonomics" (#342)

* add egonomics definition

* Update 11ty/definitions/egonomics.md

Co-authored-by: Tatiana Mac <github@tatianamac.com>

* Update 11ty/definitions/egonomics.md

Co-authored-by: Tatiana Mac <github@tatianamac.com>

* Update 11ty/definitions/egonomics.md

Co-authored-by: Tatiana Mac <github@tatianamac.com>

Co-authored-by: Tatiana Mac <github@tatianamac.com>

Author: eveline-xie

11ty/definitions/egonomics.md

@@ -0,0 +1,18 @@
+---
+title: egonomics
+slug: egonomics
+defined: true
+excerpt: the investment in time, effort, and money done by people to manage personal and professional online reputations.
+speech: noun
+reading:
+  - text: Egonomics, or the Art of Self-Management
+    href: https://ideas.repec.org/a/aea/aecrev/v68y1978i2p290-94.html
+---
+
+the investment in time, effort, and money done by people to manage personal and professional online reputations.
+
+## Origins
+
+Egonomics is first proposed by Thomas Schelling in his paper "Egonomics, or the Art of Self-Management."
+
+"Schelling suggested that individuals suffer from a sort of split-personality disorder whereby the present self wants a specific thing (e.g., eating a cookie) but the future or past self wants a different thing (e.g., losing weight). Both selves exist, but do not exist at the same time."[1](https://en.wikipedia.org/wiki/Egonomics).