Calculate the Herfindahl index for a duopoly market where each firm has equal market share.
Calculate the Herfindahl index for a three-firm oligopoly market in which one firm has an 80% market share and the other firms each have a 10% market share.
iii. Calculate the Herfindahl index for a 10-firm oligopoly in which each firm has equal market shares.
iv. Which of the above markets is the least competitive? Justify your position.