You are trying to convince your parents to finance your planned trip to europe. first, you ask them for a small favor (a bus ticket to a local city), hoping that later they will be more willing to send you on the longer trip. this technique is known as:

Foot-in-the-door technique

Explanation:

Foot-in-the-door technique (FITD) is a tactic which aim is that a person agrees to a large request by make them agree to a smaller request at first.

In this case, you want your parents to finance your planned trip to Europe, asking this would be a very big request. So instead, you try to make them agree to get you a bus ticket to a local city only (smaller request), and this way you expect that later they will be willing to send you on the entire trip to Europe and finance it.

Thus, this is an example of Foot-in-the-door technique.

nasa 3

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.