General Purpose Technology

Most inventions solve exactly one problem. A zipper closes clothing, a cordless screwdriver drives screws. Some inventions are different: they can be used everywhere and therefore transform entire sectors of the economy at once. Economists call this a General Purpose Technology, sometimes rendered in German as Basistechnologie or Allzwecktechnologie. Classic examples are the steam engine, electricity, the computer, and the internet. The term originates from economic research in the 1990s and is still used today to organize major technological shifts.

Three characteristics that identify a general purpose technology

Experts usually name three conditions. First, the technology must be usable everywhere, not just in one industry. Second, it must improve significantly and become cheaper over decades. Third, it must enable other inventions that would not exist without it.

Electricity meets all three points. It is needed in factories, hospitals, and homes. Electric power became steadily cheaper over more than a century. And without it there would be neither refrigerators, nor computers, nor traffic lights. A cordless screwdriver, on the other hand, remains a cordless screwdriver no matter how good it gets.

It’s important to distinguish this from a buzzword. Not every new technology that gets talked about a lot is a general purpose technology. Blockchain, for instance, is not considered one by many economists so far, because its use has remained limited to a few areas. The term is thus a test standard, not a compliment.

Why the prosperity boost often comes only late

General purpose technologies don’t take effect immediately. Factories began receiving electric motors around 1890, yet productivity only rose significantly about 30 years later. The reason: at first, companies merely replaced the old steam engine with one large electric motor. The real gain only came once factory halls were completely rebuilt, with many small motors at each individual machine.

This pattern repeats itself. A technology alone accomplishes little. Only once work processes, training, laws, and buildings catch up does the effect become visible. Economists speak of complementary investments, meaning everything additionally required.

This produces a typical phase of disappointment. First a technology is celebrated, then quick gains fail to materialize, and investors pull back. Yet it is precisely during this period that the foundation for the later surge often forms. Anyone who looks only at short-term figures therefore regularly underestimates general purpose technologies.

The debate over artificial intelligence

The term currently appears mainly in the debate over artificial intelligence. When central banks, consulting firms, or politicians speak of AI as a general purpose technology, they mean: this is not a single product but an upheaval like electricity. Such statements are then used to justify very large investments and new laws.

The arguments in favor are solid. Language models are being used in medicine, programming, administration, and education. The cost per query has fallen sharply within just a few years. And products are emerging that were previously impossible, such as programs that write software on their own.

Critics counter that the measurable effect on the overall economy has so far been small. Whether AI continues the lineage of the steam engine and electricity can only be said with certainty decades from now. In hindsight, general purpose technologies are easy to recognize; in the middle of events, they are not. So when you read the term in a headline, it is usually a forecast, not a fact.