Suppose there are 11 buyers and 11 sellers, each willing to buy or sell one unit of a good, with values {$14, $13, $12, $11, $10, $9, $8, $7, $6, $5, $4,}. Assume no transaction costs and a competitive market. At the optimal bid-ask spread, how many transactions would the market maker undertake in this market

a. two transacttions
b. three transactions
c. four transactions
d. five transactions


b

Economics

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