Suppose that in a competitive market the equilibrium price is $2.50. What is the marginal revenue for the last unit sold by the typical firm in this market?

Google started as one of many internet search engines, amazon started as an online book seller, and ebay began as a site where people could sell used personal items in auctions. these firms have grown to be so large and dominant that they are facing antitrust scrutiny from competition regulators in the us and elsewhere. did these online giants grow by fairly beating competition, or did they use unfair advantages? are there any clouds on the horizon for these firms -- could they face diseconomies of scale or diseconomies of scope as they continue to grow? if so, what factors may limit their continued growth?

Exercise 7-7 martinez company reports the following financial information before adjustments. dr. cr. accounts receivable $168,900 allowance for doubtful accounts $3,200 sales revenue (all on credit) 849,300 sales returns and allowances 50,440 prepare the journal entry to record bad debt expense assuming martinez company estimates bad debts at (a) 4% of accounts receivable and (b) 4% of accounts receivable but allowance for doubtful accounts had a $1,550 debit balance. (if no entry is required, select "no entry" for the account titles and enter 0 for the amounts. credit account titles are automatically indented when the amount is entered. do not indent manually.)

Asupermarket has been experiencing long lines during peak periods of the day. the problem is noticeably worse on certain days of the week, and the peak periods are sometimes different according to the day of the week. there are usually enough workers on the job to open all cash registers. the problem is knowing when to call some of the workers stocking shelves up to the front to work the checkout counters. how might decision models the supermarket? what data would be needed to develop these models?