An Economy of Neural Networks: Learning from Heterogeneous Experiences

• Tác giả: Artem Kuriksha
• Ngôn ngữ: eng
• Ký hiệu phân loại: 006.32 Neural nets (Neural networks)
• Thông tin xuất bản: 2021
• Bộ sưu tập: Báo, Tạp chí
• ID: 168056

Tóm tắt

Comment: 47 pagesThis paper proposes a new way to model behavioral agents in dynamic macro-financial environments. Agents are described as neural networks and learn policies from idiosyncratic past experiences. I investigate the feedback between irrationality and past outcomes in an economy with heterogeneous shocks similar to Aiyagari (1994). In the model, the rational expectations assumption is seriously violated because learning of a decision rule for savings is unstable. Agents who fall into learning traps save either excessively or save nothing, which provides a candidate explanation for several empirical puzzles about wealth distribution. Neural network agents have a higher average MPC and exhibit excess sensitivity of consumption. Learning can negatively affect intergenerational mobility.