Final answer:
Productivity is the value of what is produced per worker or hour worked. It can be measured as the ratio of output to input.
Step-by-step explanation:
Productivity is the value of what is produced per worker, or hour worked. It can be measured as the ratio of output to input. In the context of economics, GDP per worker or GDP per hour can be used as measures of productivity. For example, measuring GDP (output) per worker (input) can help determine productivity levels.