In medical research, cross-sectional studies differ from case-control studies in that they aim to provide data on the entire population under study, whereas case-control studies typically include only individuals with a specific characteristic, with a sample, often a tiny minority, of the rest of the population.
(redirected from Variable Expense) Also found in: Dictionary, Wikipedia. A cost that is directly proportional to the volume of output produced. When production is zero, the variable cost is equal to zero. A cost to a person or business that varies over time according to a number of factors.
For the computing term, see Overhead (computing) . In business, overhead or overhead expense refers to an ongoing expense of operating a business; it is also known as an operating expense. Overheads are the expenditure which cannot be conveniently traced to or identified with any particular cost unit.Such expenses are incurred for output generally and not for particular work order e.g., wages paid to watch and ward staff, heating and lighting expenses of factory etc.verheads are the expenditure which cannot be conveniently traced to or identified with any particular cost unit. Such expenses are incurred for output generally and not for particular work order e.g., wages paid to watch and ward staff, heating and lighting expenses of factory etc.