While I didn't find studies specifically focusing on neuroscientific research on capitalists and delayed gratification, I did find research on the neural basis of delayed gratification, executive function, and decision-making. One article discussed the potential harm that capitalism could cause to the mind, although I couldn't access the full content. More generally, neuroscience research explores the connection between brain function, behavior, and economic success, which may indirectly relate to traits commonly found in capitalists.