What effect does a network externality have on the market for a product? If a network externality is present for a product, then A. producersproducers may be more likely to supplysupply the product to create path dependence. B. producers may be less likely to supply the product because it is less unique. C. consumersconsumers may be less likely to buybuy the product to avoid switching costs. D. consumers may be more likely to buy the product because it is more useful. E. producersproducers may be lessless likely to supplysupply the product to avoid market failure.

Alarge university wanted to study the relationship between completing an internship during college and students' future earning potential. prom the same graduating class, they selected a random sample of 80 students who completed an internship and 100 students who did not complete an internship and examined their salaries five years after graduation. they found that there was a statistically higher mean salary for the internship group than for the noninternship group. which of the following interpretations is the most appropriate? a. there could be a confounding variable, such as student major, that explains the difference in mean salary between the internship and no internship groups.b. we cannot infer anything from these data since the distribution of salaries is likely right skewed.c. you cannot draw any valid conclusions because the sample sizes are different.d. more students should complete internships because having an internship produces a higher salary.