Roundabout Production

Imagine a house a short walk from a spring. Whenever you are thirsty, you can go there and drink from your hands. Or you can first make a bucket and bring water home. Another option is to build a water supply: more work at the start, less carrying later. Böhm-Bawerk used a similar example to explain this indirect method. Accessible water remains the goal; the bucket and supply system are means of reaching it. For a single visit, though, building the system may be pointless. [1]

The advantage of a water supply is not that it took a long time to build. It is having water at the house. Simply postponing your walk to the spring would improve nothing. Böhm-Bawerk shows how tools expand production possibilities; Mises draws attention to choosing between results available at different times. Neither point means a more complicated project is always better. We need to know what it makes possible and what we give up to achieve it. [1] [2]

While building the supply, you still need food, water and tools. If you devote all your effort to construction without provisions or help, you may have to stop before the water flows. This is how Mises explains the role of saving: postponed consumption frees resources for work whose result comes later. A business encounters this as the need for money to pay wages and buy materials. Money alone, however, cannot replace missing food, workers or pipes. [3]

A finished water supply looks attractive if we consider only turning on the tap. A fair comparison with a bucket also includes construction, repairs and how long the system will serve us. Mises distinguishes the time until a product is finished from its useful life. In our example, the same project may make sense for a long-term home but not if we plan to move soon. Equipment can work perfectly without being worthwhile for everyone. [2]

Even excellent pipes are of little use if the spring dries up or the parts do not fit. We need things that work together. Economist Ludwig Lachmann calls this complementarity: productive resources support each other in a particular use. The same applies to a workshop where a new machine needs suitable power, an operator and materials. The outcome depends on the working combination, not just the price or quality of its most expensive part. [5]

Getting water with less effort is a technical benefit. Interest on a construction loan is a different matter. Mises rejects explaining interest solely through the greater output of tools. His theory centres on time preference: how a person values satisfying a need sooner rather than later. This is a particular economic explanation, not a formula for a lending rate. More water or a longer building period alone cannot tell us what the interest rate will be. [4]

What if the household decides to move while construction is under way? Work already done cannot be undone, but that does not automatically justify finishing the rest. Some materials might be reused or sold. Lachmann describes how changing circumstances force owners to find other uses for equipment, sometimes less rewarding ones. What matters is what further work can achieve from this point on. Past effort alone cannot make continuing worthwhile. [5]

Imagine a team developing a wallet for Bitcoin. Their software is meant to help people receive and send payments and see their balance. Before anyone can use it, the software must be written and tested. This is a modern illustration of preparing a tool for a later service, not an example taken from the historical books. Users benefit from the effort only if the wallet meets their needs and can be maintained. A lengthy development process alone proves neither quality nor future profit; what matters is the result and whether people have a use for it. [2] [5] [6]