Template-Type: ReDIF-Paper 1.0 Author-Name: Konstantinos Georgalos Author-Name-First: Konstantinos Author-Name-Last: Georgalos Author-Name: Nathan Nabil Author-Name-First: Nathan Author-Name-Last: Nabil Title: Testing Models of Complexity Aversion Abstract: In this paper we aim to investigate how the complexity of a decision-task may change an agents strategic behaviour as a result of increased cognitive fatigue. In this framework, complexity is defined as a function of the number of outcomes in a lottery. Using Bayesian inference techniques, we quantitatively specify and estimate adaptive toolbox models of cognition, which we rigorously test against popular expectation based models; modified to account for complexity aversion. We find that for the majority of the subjects, a toolbox model performs best both in-sample, and with regards to its predictive capacity out-of-sample, suggesting that individuals result to heuristics when the complexity of a task overwhelms their cognitive load. Creation-Date: 2023 File-URL: http://www.lancaster.ac.uk/media/lancaster-university/content-assets/documents/lums/economics/working-papers/LancasterWP2023_011.pdf File-Format: application/pdf Number: 400814269 Classification-JEL: C91, D91, D81 Keywords: Complexity aversion, Toolbox models, Heuristics, Risky choice, Bayesian modelling Handle: RePEc:lan:wpaper:400814269