In a research questionnaire, question asked in different way to check whether the same answer is forthcoming. Clarifies possible misunderstanding and checks accuracy of response.
The Mathematics of Direct Sales and Performance Marketing Profitability: How to Make One-Shot and Subscription-Based Products and Services Viable
Before you even begin to think about the detailed techniques of performance marketing and selling your product or service directly – the market, the design of the material, the method of order fulfillment – you …