Decision rights at a national restaurant chainpop are more centralized than decision rights at chain of "mom & pops" restaurants. For example, mom and pops$$ store managers are given discretion concerning what items to place on the menu, pricing of meals and store decoration. National chain store managers are not provided this discretion. Control

$($a$)$ How is the decision$-$making at the national business different from the mom and pop restaurant business and why would these differences make a centralized decision making structure optimal for the national restaurant and a decentralized decision rights optimal for the local mom and pops restaurant?

$($b$)$ What should be measured to evaluate the performance of the store managers of a mom and pop restaurant versus a national chain restaurant store manager and why?