In our societies, any kinds of products or services must need to apply demand and supply economic theory to analyze whether the kind of product or service may be value to invent to sell or serve to their customers in consumer market, if the kind of product or service demand number is less, then it ought not to raise manufacturing number to avoid ""low price "" sale or if the kind of product demand number is more, then it ought raise manufacturing number to have enough number in order to raise "" high price"" sale to satisfy customers their needs to buy their products.However, whether your product or serive's demand number depends on supply number or your product or service's supply number depends on demand number in order to make ths sale price is reasonable high or low level and reasonable supply number valuation.

Our business society had developed long time from farming period to manufacturing period, then to service industry period, till to nowadays technology service and manufacturing period. It brings this question: Can technology or human behavior may influence economic development? Human ourselves foolish or enjoyment behavior whether which can bring economic recession? If human can forgive to do enjoyment behavior, we can help economic growth? I shall apply behavioral economic theory to indicate cases to attempt to explain these questions.