The TI-Complexity research field focuses on the analysis and empirical validation of behavioral micro, macro and finance models under “bounded” rationality, where agents are not fully rational, but behave in accordance with experimental and empirical evidence. A central question is: which emerging aggregate macro behavior arises through the interactions of individual micro decisions of boundedly rational heterogeneous agents? Focus topics are: Complex systems & nonlinear dynamics; Bounded rationality, learning & heterogeneous expectations; Behavioral & experimental macro-finance; Complex networks; Dynamic games in complex systems; Strategic interaction and (non-)cooperative games.