Company demand is the company’s estimated share of market demand at alternative levels of company marketing effort in a given time period. It depends on how the company’s products, services, prices, and communications are perceived relative to the competitor’. Other things equal, the company’s market share depends on the relative scale and effectiveness of its market expenditures. Marketing model builders have developed sales response functions to measure how a company’s sales are affected by its marketing expenditure level, marketing mix, and marketing effectiveness.