Q = Per Capita Consumption of Chickens, Pounds
DI = Real Disposable Income Per Capita, $
PC = Real Retail Price of Chicken Per Pound, Cents
PP = Real Retail Price of Pork Per Pound, Cents
PB = Real Retail Price of Beef Per Pound, Cents
PS = Composite Real Price of Chicken Substitutes Per Pound, Cents
YEAR Q DI PC PP PB