Interaction design and economics are two different professions but can be tied together by their connection to systems thinking. If an economist considers currency (money) as their system then in that same vein an interaction designer considers human behavior (interaction) as their system. Both are equally caring about how humans operate in the bigger picture. The difference in the system thinking is the outcome. In this article, contributing writer Chris Becker breaks down the two factors of interaction as applied by an economic theory: Macro and microinteraction.