Seventy percent of the students in a classroom are women and 30 percent are men. one student is described as ambitious, athletic, and assertive. why are most people likely to think this description refers to a male student?

The correct answer to this question is that:

People are “using the representativeness bias / heuristics”

In psychology, heuristics are rules or set of rules which people use to form judgements or decisions. In this case, people believe that an ambitious, athletic, and assertive person would be a representation of a male.

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.