E. Böhm-Bawerk, “The Function of Saving” (1901)

Böhm-Bawerk’s essay replies to Mr. Bostedo’s attack on the capital theory of the Positive Theory of Capital. Bostedo had denied that ordinary saving affects capital formation; Böhm-Bawerk answers that this denial mistakes money phenomena for real industrial relations. He defends the proposition that

an increase in the capital of a community can only take place in consequence of a balance of saving over spending on the part of its members

The structure follows Bostedo’s three charges: equivocation over “saving,” an artificial illustration, and a logical error. Böhm-Bawerk’s first move is to show that saving has two sides, not two meanings. Its negative side is non-consumption or non-spending; its positive side begins when deposits are lent through banks to business, mortgages, railroads, corporations, factories, and machines. If income is spent on luxuries, it calls forth present consumption goods; if saved, it calls forth productive instruments. Thus the common act of saving must be followed beyond the bank window:

I simply direct attention to the other side of the process, to the positive consequences of the negative first step, which is the not-consuming.

The second criticism—that his example of universal saving is “unnatural”—is treated as a misunderstanding of abstraction. Simple examples may be improbable precisely because they isolate a principle from the confusion of actual life. The real issue is the third objection. Bostedo argues that if people save one quarter of income, demand for consumption goods falls, producers curtail output, and savings can find no outlet. Böhm-Bawerk replies that this proves too much: it would make all social accumulation impossible and turn national thrift into illusion. The error is to infer a fall in production generally from a fall in immediate consumption.

The truth is that a curtailment of consumption involves, not a curtailment of production generally, but only, through the action of the law of supply and demand, a curtailment in certain branches.

His decisive conceptual move is temporal. Saving does not extinguish demand; it shifts command over goods from the present to the future. The saver wants later enjoyment, usually with interest, for himself or heirs. “Abstinence” is therefore not final renunciation but waiting, and the demand released from present pleasures is redirected toward capital goods and longer productive processes.

The man who saves curtails his demand for present consumption goods but by no means his desire for pleasure-affording goods generally.

This temporal analysis grounds his theory of capital formation. When fewer present goods and more future goods are wanted, land and labor need not be idle; they can be invested in “intermediate products” and more roundabout methods. Crusoe’s stored provisions and improved weapons make the relation visible: he saves food in order to gain time to make tools that will yield more future food. Modern credit obscures this relation but does not alter it.

The harder problem is uncertainty: savers hold claims on future goods without specifying exactly which goods or when. Böhm-Bawerk answers with the analogy of bank deposits and the law of large numbers. Individual claims are unpredictable, but aggregate withdrawals follow patterns; likewise, producers anticipate demand through experience, experiment, and adjustment. Crises are the penalty for mistakes, not proof that saving lacks function. A capitalistic economy normally maintains a stream of consumables while carrying capital into later periods:

in each period a certain quantity of goods ready for consumption is turned out, while a greater stock of goods in the form of capital remains over for the service of future periods.

The essay remains relevant as a concise Austrian rebuttal to the fear that saving necessarily depresses production. For Böhm-Bawerk, saving changes the time-structure and technical form of production, enabling longer periods, improved appliances, cheaper products, and broader future demand. Wants alone do not conjure railways or canals into existence; they require prior accumulation. His closing example gives the argument its historical force:

but for the savings of the English and the French, Egypt would not to the end of time have built the Suez Canal.

Saving’s function, then, is to turn present restraint into future productive capacity: deferred consumption becomes the capital structure through which later enjoyment is made possible.