The Herfindahl-Hirschman Index (HHI) is a mathematical approach to understanding market concentration that provides a single concentration indicator. What is the HHI for an industry characterized by the below noted data?Firm 1 has a market share of 40%Firm 2 has a market share of 20%Firm 3 has a market share of 15%Firm 4 has a market share of 15%Firm 5 has a market share of 10%HHI=___

Proportion of us adults who own a cell phone. in a survey of 1006 us adults in 2014, 90% said they had a cell phone.1

2. the language of price controls consider the market for rental cars. suppose that, in a competitive market without government regulations, the equilibrium price of rental cars is $58 per day, and employees at car rental companies earn $19.50 per hour. complete the following table by indicating whether each of the statements is an example of a price ceiling or a price floor and whether it results in a shortage or a surplus or has no effect on the price and quantity that prevail in the market. statement price control effect there are many teenagers who would like to work at car rental companies, but the minimum-wage law sets the hourly wage at $23.00. the government has instituted a legal minimum price of $87 per day for rental cars. the government prohibits car rental companies from renting out rental cars for more than $87 per day.

When using various forms of promotion to carry the promotion message, it is important that the recipients of the message interpret it in the same way. creating a unified promotional message, where potential customers perceive the same message, whether it is in a tv commercial, or on a billboard, or in a blog, is called