For some racquet sports, there have been increases in the size of the racquets; also, the methods and materials used for making racquets have improved. To which problem in the construction of the CPI is this situation most relevant?

a. substitution bias

b. introduction of new goods

c. unmeasured quality change

d. income bias

answer; tech (a) is correct;

1) the stages a new product goes through from beginning to end, i.e., the stages that a product passes through from introduction through growth, maturity, and decline. 2) the time from initial research and development to the time at which sales and support of the product to customers are withdrawn. 3) the period of time during which a product can be produced and marketed profitably.

                                          hope it