CONTROLLABLE MARGIN technically is the excess of contribution margin over controllable fixed costs. Managerially it is that margin that you can reasonably expect from a process that is balanced and controlled. Controllable margin is considered to be the best measure of a managers performance in efforts to control revenues and costs.
BARRIERS TO ENTRY are obstacles to the entry of new firms into a market. Barriers to entry may take various forms. They may be technical barriers, legal barriers or barriers that arise from strong branding of the product.
SEVERANCE TAX is levied on production of natural resources taken from land or water bottoms within the territorial boundaries of a state.
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