True experimental designs include the pretest-posttest control group design and the posttest-only control group design

Which of the following statements about network economics is not true?

A) eBay is an example of a business model that is based on the principle of network economics. B) The law of diminishing returns does not always apply to every situation. C) From a network economics perspective, the value of a community of people grows as the number of participants in the community increases. D) Information technology can be strategically useful from a network economics perspective. E) In network economics, the marginal cost of adding new members to the network is higher than the marginal gain.

Which product development tool helps you to ensure that your new product has the features that your market research indicted that customers' value?

a. Web-based tools b. prototyping c. house of quality d. design for manufacturing