Suppose that flu shots create a positive externality equal to $9 per shot. further suppose that the government offers a $9-per-shot subsidy to producers. what is the relationship between the equilibrium quantity and the socially optimal quantity of flu shots produced?

1) they are equal.

2) the equilibrium quantity is greater than the socially optimal quantity.

3) the equilibrium quantity is less than the socially optimal quantity.

4) there is not enough information to answer the question.

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Problem 3: access control pokeygram, a cutting-edge new email start-up, is setting up building access for its employees. there are two types of employees: managers and engineers, and there are three departments: security, networking, and human resoures. each employee works in a single department, and each department is housed on a different floor. managers are allowed access to any floor, while engineers are allowed access only to their own floor. there are three badge-operated elevators, each going up to only one distinct floor. every employee has one badge. pokeygram wants to use the best possible access control method in order to minimize delay for the elevators (a) access control matrix, 1. which of the following would you recommend that pokeygram use: (b) access control lists, or (c) capabilities? make sure to justify your answer. 2. what, if any, would be the benefits (and/or disadvantages) of using rbac (role-based access control) in this situation? keep your solution for this problem limited to 10-12 lines of text.

1. what are some of the barriers alibaba is facing as it expands globally?