As of 2012, mortgage-backed securities made up approximately what portion of securities held by a bank?

The term "brain drain" refers to

A) the decreased quality of the college-educated workforce. B) highly educated individuals who leave developing countries for high-income countries. C) the negative impact on brain function of an individual's overinvestment in human capital. D) the diminishing returns to studying for an exam.

AT&T is an example of a business that used market power to

A. avoid government regulation. B. squash the competition. C. invest in important research benefiting society. D. minimize average costs of production.