Chapter FourThe impact of behavioral economicson influence consumer behavioralutility maximizing function predictionI have one interesting question? If consumers are not always rationally maximizing some kind of utility function to bring benefits to them after they bought the product. Can manufacturers apply behavioral economic method to predict what factors can influence them to decide final shopping decision to satisfy their own best interest? Usually behavioral economic method assumes consumers choose to buy any products, it is based on maximizing utility function factor to satisfy their needs.Therefore, it assumes that consumers choose to buy any products, the reason is because that they feel the product can give the most efficient and welfare maximizing to satisfy their useful needs, before they choose to buy the product. So, if the consumer chose to buy the product, it is not maximizing utility function feeling to influence he/she choose to buy the product. So, whether what other factors can influence whose rational choice to buy the product. In fact, behavioral economic method can make any questioning well-established assumptions to attempt to provide a similar analytical predictive power to evaluate whether how and why consumers will choose to do the purchase decisions to the products. It also assumptions of rational and profit-maximizing behavior is any product sellers or manufacturers' main aim or intention . However, any manufacturers or product sellers expect to predict consumer behaviors more accurately, they need to prepare to gather evidence on relevance and testing the explanatory power of alternative any age, sex, personal characteristics of consumer behaviors to gain the more accurate behaviours for any predictive result of consumer behavior changes.However, if consumers are not always rationally maximizing some kind of utility function to any products. Why do we predict what factors can influence their consumption decision or shopping choice more easily? I think other factors which can influence consumer individual choice. They may include cheaper attractive price to compare other kinds of similar brands of products factor, product attractive appearance factor, friend of family's good recommendation concerns to the brand of product's quality or effective function factor, familar or famous brand factor etc. Therefore, it seems tht maximizing utility function welfare or benefit factor must not only one influential factor to attract or persuade any consumers to make final decision to choose to buy the brand of products absolutely. Although, in behavioral economic view point, consumers will need any products to provide more utility benefits or welfares to satisfy whose needs. They will compare whether whice product's price is value to satisfy their long-term useful utility function need. They expect products will be durable and they can provide more functions to let them to enjoy when they are using the products. However, in fact, there are many other unpredictive factors will change consumer individual feeling to maximize utility function need which will be their prior or preference of consumption decision or choice more than other kinds of different viable or non viable factors before they choose to buy the product.