What is neuroeconomics?

Neuroeconomics tries to bridge the disciplines of neuroscience, psychology, and economics. I think of economics and psychology as really, in some sense, one discipline. I know that that's a strident statement to make, but they really are siblings separated at birth. Psychology and economics are complementary disciplines, in many cases studying the same phenomena: decision making, value-based judgment, heuristics. One side approaches it from a phenomenological, experiment-driven perspective and the other from an abstract, theoretical perspective. 
J. Cohen...
https://insights.som.yale.edu/insights/what-is-neuroeconomics

Introduction to Neuroeconomics: How the Brain Makes Decisions...

Economics, psychology, and neuroscience are converging today into a unified discipline of Neuroeconomics with the ultimate aim of creating a single, general theory of human decision-making. Neuroeconomics provides biologists, economists, psychologists and social scientists with a deeper understanding of how they make their own decisions and how others decide. Neuroscience, when allied with psychology and economics, creates powerful new models to explain why we make decisions. Neurobiological mechanisms of decision-making, decisions under risk, trust and cooperation will be central issues in this course. You will be provided with the most recent evidence from brain-imaging techniques (fMRI, TMS, etc.) and introduced to the explanatory models behind them.

https://tr.coursera.org/learn/neuroeconomics

Neuroeconomics