0455 · 1.3Opportunity cost

Scarcity and opportunity cost

0:00Imagine you have saved enough money for either a new phone or a holiday, but not both. Buying the phone means giving up the holiday. The price tag shows your money payment, but it does not identify the experience you sacrifice. By the end of this video, you will understand how that sacrifice influences economic decisions. The starting point is scarcity, which means there are finite resources but unlimited wants.

0:21Your spending is restricted by your available money, while a worker has limited time. Firms have limited funds and equipment, and governments face limits on available resources. These restrictions force choices because the same resources cannot always support every possible use. Opportunity cost is the next best alternative forgone when a choice is made. Forgone simply means given up. In our opening example, the holiday is the opportunity cost of buying the phone, assuming it is your best alternative.

0:48The concept identifies what those resources would otherwise have been used for. Suppose the same savings would also pay for a laptop, which you like less than the holiday. Choosing the phone rules out both alternatives, yet its opportunity cost is only the holiday. You would not have bought everything else with the same savings. The next best alternative identifies the single option you would have chosen instead. That alternative must also be available to you.

1:11An expensive car cannot be your opportunity cost if your savings could never have bought it. Start by identifying the scarce resource, then consider its realistic alternative uses. Once you know which option comes next in your preferences, you can identify what the decision sacrifices. Opportunity cost exists only for economic goods, which use scarce resources and therefore involve a sacrifice. A free good, such as air, is not scarce and so has no opportunity cost.

1:38However, a zero price does not automatically make something a free good. A concert with free entry still uses performers, equipment and electricity that have other possible uses. Opportunity cost is not always a money payment. A student spending an evening revising may sacrifice time with friends, even without buying anything. Equally, the fifteen dollars spent on a meal does not identify its opportunity cost by itself. We need to know the next best use of that money.

Consumer and worker choices

2:04A consumer allocates resources by deciding how to use an available budget. With the phone and holiday choice, the consumer compares better communication with travel and relaxation. If the phone matters more, giving up the holiday may be worthwhile. Someone who values the experience more highly could make the opposite decision using exactly the same budget. Considering opportunity cost does not mean avoiding every sacrifice, because scarcity makes that impossible.

2:29Instead, it helps consumers judge whether the chosen benefit is worth the alternative forgone. If the old phone still works well, buying a replacement may seem less attractive. The holiday has not changed, but the benefit of choosing the phone has become smaller. Workers also allocate scarce time between competing uses. Studying instead of working may mean giving up wages available from a paid shift. The worker compares those lost earnings with the possible benefits of gaining qualifications.

2:55Study may offer better future opportunities, but someone needing income immediately might place greater importance on the wages. Consider a worker who has four hours available this evening. A paid shift would earn ten dollars per hour, but the worker chooses study instead. Assume that taking the shift is the next best alternative. To identify the opportunity cost in money terms, we calculate the wages that this decision gives up.

3:18First, identify the four hours that could have been spent working. Next, multiply those four hours by ten dollars per hour. The earnings forgone are forty dollars, so that is the opportunity cost of studying in this example. We calculate the rejected option’s earnings because those are the wages sacrificed by the choice. The forty dollars is not a fee charged for studying. It is income the worker could have earned but now gives up.

3:41Nor should we automatically add the value of every other possible evening activity. Because the paid shift is the next best alternative, its lost earnings provide the relevant opportunity cost here.

Firms, governments and exam answers

3:51A firm might have enough funds for either a new machine or extra workers. If hiring those workers is its next best alternative, that is the opportunity cost of buying the machine. The firm compares the expected benefits of both options. A machine could increase output, while extra workers might provide more flexible customer service. Opportunity cost makes the firm consider more than whether the machine is useful. It must also judge whether the investment is preferable to hiring additional staff.

4:18If extra workers would contribute more to its objectives, buying the machine may be a poor allocation of funds. The better decision depends on what the firm expects each option to achieve. A government may choose between building a hospital, a road or a school with a limited budget. Suppose the road is its next best alternative to the hospital. Building the hospital then has the road as its opportunity cost.

4:40The government compares improved healthcare with the transport benefits that would otherwise have been available. Environmental effects can influence this comparison alongside other benefits. A road might improve access to jobs, but it could also damage habitats or encourage more traffic. Choosing the hospital sacrifices the road’s benefits while avoiding some possible environmental harm. Considering opportunity cost helps governments judge alternatives, rather than treating any useful project as automatically the best choice.

5:07A frequent exam mistake is naming the chosen item as its own opportunity cost. The hospital is what the government receives, while the road is what it gives up. Another error is listing every rejected project, even when only the next best alternative is relevant. Saying money alone is usually too vague when the question identifies a specific alternative use. In Multiple Choice questions, find the next best alternative that was rejected before selecting an answer.

5:32In Structured Questions, define means giving a precise meaning, while state asks for a brief answer without developed reasoning. For explain, you must show why or how something happens. Analyse goes further by developing linked effects, and discuss requires arguments on both sides with a justified conclusion. An exam-style question could ask you to explain how opportunity cost influences a government choosing a hospital rather than a road. A clear answer starts with the alternative forgone.

5:58The road is the opportunity cost because the budget cannot finance both projects. The government compares improved healthcare with better transport and chooses the hospital if it considers healthcare more valuable. If asked to discuss whether the hospital is the better choice, develop both sides. It may be preferable where inadequate healthcare creates an urgent need for treatment. However, the road may offer greater benefits where poor transport prevents access to workplaces or existing hospitals.

6:24On balance, the hospital is the better choice where healthcare shortages are urgent, especially if the road would also harm the environment. Opportunity cost connects scarcity, choice and sacrifice. It is the next best alternative forgone, not every rejected option or automatically the amount of money paid. Consumers, workers, firms and governments use it to compare competing uses of their resources. Understanding what a decision gives up helps explain whether its benefits make that sacrifice worthwhile.