With the upturn in living standards and increasing work stress, people have started to pay more attention to how happy they feel in their daily lives. Evaluating people\u27s happiness is becoming increasingly important in scientific fields. The focus of this thesis is to build a rational happiness function and to do simulations on several kinds of social networks related to the real world in a trading model with only two types of goods but no common currency. The purpose of the simulations is to seek the equilibrium points of the trading system. For this model, the parameters in the function and the shape of networks are key factors that affect the experimental results
