Quote from jordanf:
For the household survey (which determines the unemployment rate) if you have done any amount of work, for any amount of pay (or profit), you are employed. So yes, the soccer mom who makes $50 a week is employed. Also, if you are self employed, or spend at least 15 hours working at a family business, you are considered employed regardless of whether you earn any pay or profit.
Quote from Vinny1:
They should count people as employed if they work full-time for a company on a salary, wage, or commission, regardless of how much they earn. They should not count part-timers. If they are self-employed, they should count them if they earn at least $25,000/year or more.