Management Expense:Evidence for Sticky Behavior of Selling, General, and Administrative Costs in Iranian Firms

A fundamental assumption in cost accounting is that the relation between costs and volume is symmetric for volume increases and decreases. In this study, we investigate whether costs are "sticky"—that is, whether costs increase more when activity rises than they decrease when activity falls by an equivalent amount. Our studies and researches are showing, that selling, general, and administrative (SG&A) costs increase on average 0.43% per 1% increase in sales but decrease only 0.32% per 1% decrease in sales. This sticky cost behavior contradicts the traditional model which assumes that costs behave symmetrically for activity increases and decreases. Our analysis compares the traditional model of cost behavior in which costs move proportionately with changes in activity with an alternative model in which sticky costs occur because managers deliberately adjust the resources committed to activities. We test hypotheses about the properties of sticky costs and how the degree of stickiness of SG&A costs varies with firm circumstances.