Although we should be cautious when drawing conclusions from a single study, we can be more confident in the findings of ___________ research which involves combining information from multiple studies

Which two industries contribute the most money to candidates of both major American political parties?

a. mining and agriculture b. health care and finance c. real estate and insurance d. technology and manufacturing

Which school of economists is associated with Milton Friedman?

A) the "Chicago school" B) the "New York school" C) the "Nebraska school" D) the "Toledo school" E) the "Harvard school"