Assumption of the consumer individual rational and welfare maximizing behavior seems to have been an overall satisfactory approach to purchase the product or consumer the service. Even, if the country's overall economic environment is worse in the year. It seems that the country's worse economic environment factor in this year, it must not influence the consumer individual consumption desire to be less. So, it seems that when the consumer has more confidence on efficiency and welfare to buy the product or consume the service. I believe that the current year's worse economic environment factor won't influence every consumer individual consumption desire to buy the product to use or consume the service to be fallen down easily. It is due to the consumer has more confidence to feel this brand of product or service has more useful efficiency or it can give more consumption welfare to the consumer to enjoy to compare the other similar brands of products or services in this competitive consumption market.So, it concludes this outcome. It is not absolute all these brands of products or services can not potential attract or persuade consumers to buy to use or consume the service, when this year economy is worse in the country. For example, this year US economy environment is worse, it does not represent all US car purchase planners won't make decisions to buy different brands of cars to drive in this year, due to they feel that they will fail unemployment in possible in this year. If this US car purchase planner has more car product efficiency and welfare confidence to buy this brand or car to drive on the road safely. Then, the US car purchase planner won't delay the time to buy this brand of car to drive when this year US's worse economic environment factor which will possible cause he/she to be dismissed or unemployed suddenly in this year, when whose employer decreases customer number and profit. So, I believe that every consumer individual consumption behavioral desire must not be influenced to decrease during the country is encountering worse economic environment changing situation in this year.An interesting question concerns how to predict consumption behavior and assumptions about how consumers make decisions when the country's economic environment is worse in this year. If the country's consumers are not always rationally maximizing some kind of utility function, when the country's economic environment is worse in the year, whether what other factors will persuade them to raise consumption desires? Can they still claim that their decisions to make purchase too much non-essential products or consumer too much non-essential entertainment service are always in their own best interest when the country's economic environment is poor in the year? Usually any product manufacturers/service providers commonly rely on the competitive process to produce the consumption market outcomes that are have the most favorable to consumers. But, if the country's consumers will be influenced to decline consumption behaviors by worse economic environment factor influence generally.In a model of rational behavior, the country's firms in a competitive environment compete mostly on the merits and the country's overall consumption market outcome is lesser efficient and welfare maximizing to consumers, due to worse economic environment factor will influence the country's overall consumption desires to be declined. Does this result continue to hold when the rationally consumption assumption about the country's consumer behaviors generally?