• The total money spent on education

• The financial investment in businesses

The knowledge and skills of workers

• The number of people in a country

Inputs, outputs, and consumption

Land, labour, and services

Land, labour, and capital

Resources, workers, and money

• Because its consumption by one person does not reduce availability for others

• Because it cannot be owned

• Because it is not used in production

• Because it is constantly replenished

• All people of working age who are employed or looking for work

• Only those with jobs

• Government workers