Measures of labor productivity compare the growth in output to the hours worked over a period of time.

The expense-to-income ratio is a formula that can help people gauge how efficiently they are mentally configuring their spending in order to generate income. This can be expressed mathematically as expenses a person spends divided by the amount of income sources equals a person’s expense-to-income ratio assessment.

An asset is something that may generate cash flow, reduce expenses, or improve income sources.  Assets can be classified as current, fixed, financial, tangible, or intangible.

The extent of an individual’s continual physical, emotional, mental, and social ability to do well in their environment.

The rate at which something can be learned.