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.
variable expenses. Expenses that vary with some activity. For example, sales commissions expense and cost of goods sold will be greater when sales are greater; electricity expense will decrease when machine hours are reduced.xpenses that vary with some activity. For example, sales commissions expense and cost of goods sold will be greater when sales are greater; electricity expense will decrease when machine hours are reduced.