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July 18, 2025 

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TIE-IN SALE: A type of sale in which consumers can buy one good only if they purchase another good as well. For example, if your grocery store sells you a bag of tea with the condition that you buy a pound of sugar, that would be a tie-in sale. Because they allow a monopoly to increase its profit over what it could make by selling the two goods separately at constant prices, tie-in sales can be used to price discriminate. However, it is important to realize that there are other reasons for tie-in sales other than price discrimination, such as to increase efficiency. For example, when we buy a car, it comes as a package of several goods (tires, engine, etc), which would be very difficult (and inefficient) for consumers to assemble if they were bought separately.

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PARETO IMPROVEMENT: Based on the Pareto efficiency criterion, the notion that an action improves efficiency if it is possible for one person to benefit without anyone else being harmed. A Pareto improvement is possible if the economy has idle resources or market failures. With idle resources, more production is possible to help some without hurting others. With market failures, corrective actions can eliminate deadweight loss that can then be use for benefits economy-wide. A contrasting condition for attaining efficiency is the Kaldor-Hicks improvement.

     See also | Pareto efficiency | efficiency | Kaldor-Hicks improvement | Kaldor-Hicks efficiency | welfare economics | externality | market failure | unemployment | resources |


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BANK ASSETS

What a bank owns, including loans, reserves, investment securities, and physical assets. Bank assets are typically listed on the left-hand side of a bank's balance sheet. Bank liabilities, what a bank owes, are listed on the right-hand side of a bank's balance sheet. Net worth is the difference between assets and liabilities. The largest asset category of most bank is loans, which generates interest revenue. A critical asset category used to maintain the safety of deposits is reserves (vault cash and Federal Reserve deposits).

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