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In an observational study, the researcher exerts strict control over the units in the study.
Standard of Living
The amount of riches, ease, physical items, and basic requirements possessed by a distinct class or region.
Productivity
The measurement of the efficiency of production, often evaluated as the ratio of output to inputs in the production process.
Human Capital
The economic value of a worker's experience and skills, including education, training, intelligence, skills, health, and other things employers value.
Technological Knowledge
Information and skills acquired through experience or education regarding the use, development, and application of technological tools and systems.
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