Why does a consumer’s price elasticity of demand for a good depend on the fraction of the consumer’s income spent on the good?

Hundreds of a bank's customers have called the customer service call center to complain that they are receiving text messages on their phone telling them to access a website and enter personal information to resolve an issue with their account. what action should the bank take?

How does hipaa address employee’s access to e-phi?

Why is efficiency an important economic goal?