How much do earn the chiefs of the States in our planet? We can easily see that the best paid persons are not those having the biggest responsibilities.
Marketing: Data model
One of the main concerns for a firm is when, how and to whom they should market their products. Firms make marketing decisions based on how much data they know about their customers and potential customers.
They may choose for mass market when they do not know much about their customers or they may market directly the consumer based on some observed characteristics.
Depending on the needs, the firm will use one of the two methods (primary and secondary) to collect its data.