Five firms sell pez candy and differentiate in terms of customer service and flavors
name market share%
pez products 30
pez international 25
super pez 20
pez and associtate 15
piettes pez 10
a. what is the four firm concentration ratio?
b. calculate the HHI (Herfindahl Index)
The four firm concentration ratio and the HHI (Herfindahl Index) have been calculated.