An earlier chapter discussed the variables that shift the demand curve and the variables that shift the supply curve. how many of these variables that shift microeconomic demand and supply curves also shift the aggregate demand (ad) curve or the short-run aggregate supply (sras) curve? what might you conclude about the relationship between the concepts of demand and supply in microeconomics and in macroeconomics?

Which of the following is true of the strategy of planned and unplanned change in global marketing? a) cultural congruence involves deliberately changing certain aspects of culture to meet marketing goals.b) all marketing efforts require planned or unplanned change in order to be accepted.c) planned change involves marketing products similar to the ones already on the market.d) the first step in bringing about planned change in a society is to remove obstacles for acceptance of a product.e) social planners gained the acceptance of protein-rich diets among the peoples of underdeveloped societies using the strategy of planned change.

Because of the violent nature of the sport, professional american football players are at risk of suffering concussions (or brain injuries) during the violent collisions that occur between players during the game. violent collisions involving hits to the head are particularly risky. suppose the commissioner of the national football league (nfl) institutes a rule requiring players to wear a new, lighter helmet that is designed to reduce head trauma during collisions between players on the field. while the new helmets the probability of a concussion resulting from each individual collision, at the same time the new helmets could also give football players an incentive to play more , which could potentially the amount of violent collisions and thus the number of concussions suffered by nfl players, all else equal.

Jack is a college athlete who requires 2,800 kilocalories a day to support his total energy needs. even though jack likes many different foods and makes it a point to try new things, he only consumes approximately 1,600 kilocalories a day. which one of the characteristics of a healthy diet is jack missing?