American product development runs sessions in which ordinary users attempt tasks while being observed, and the failures are recorded as defects in the product rather than in the user. The method locates the fault in the design by default.
studies
The savings rate
Sparquote. German household saving rates run consistently high by international comparison and rose further during periods of uncertainty rather than falling. The reserve grows when it looks most likely to be needed.
The Great Resignation
American quit rates reached record levels in 2021 and 2022, and the phenomenon was widely attributed to a reassessment of what work should cost a person. It was expressed as millions of individual departures rather than as any change in law or policy.
The vehicle inspection
Die Hauptuntersuchung. Every German car over three years old is inspected every two years. Roughly 30 million passenger cars pass through it. It has been mandatory since 1951.
The TÜV Report 2026, drawn from 9.5 million inspections between July 2024 and June 2025, found that 21.5 percent of vehicles had significant or dangerous defects.
Read that number the German way. One car in five was on the road with a serious fault, and the system found it before the fault found a person.
Burnout
The World Health Organization classified burnout as an occupational phenomenon in 2019, and American surveys report it at high rates across professions. It is discussed in the United States as a condition of the individual, with individual remedies — resilience, boundaries, self-care.
The always-on expectation
Company-issued phones, email answered in the evening, and the term work-life integration proposed in American management writing as an improvement on balance. The framing treats the boundary itself as the outdated idea.
Evidence-based practice
American medicine reorganised itself around the phrase in the 1990s, and it spread to nursing, education, social work and policy. The argument was that established practice rests on authority and habit, and should rest on outcomes measured in trials. A whole profession accepted that its procedures had the wrong derivation.
The 2,000-square-foot house
The average new American single-family home has grown substantially since the 1970s while household size has fallen. More space per person, heated and cooled.
Grounded theory
Glaser and Strauss published it in 1967: an American research method in which theory is built up from data rather than tested against it. The researcher is instructed not to begin with a hypothesis. The categories are supposed to emerge.
Unused vacation
American employees leave paid vacation days unused every year, and survey organisations count them annually as a recognised national phenomenon. The days exist, they are granted, and they are not taken.