Many kindergarten teachers have advanced education degrees, yet they have lower average earnings than other individuals with similar education levels. a potential explanation for the differences in earnings is that kindergarten teachers

    Have more pleasant working conditions

Explanation:  Working conditions are very important, i.e what kind of working conditions we work in. Working conditions include the work environment as well as all other circumstances that affect our work, in terms of whether they make it difficult or easier. According to such criteria, kindergarten teachers are considered to work in more pleasant working environment, so their pay is less than their colleagues in other workplaces. More pleasant  work environment in kindergarten is designed to contribute to the mood and activity of children, and such an environment also affects teachers. Such a comfortable work environment is achieved with child-friendly decor, which usually consists of cheerful colours, drawings and motifs on the walls. Then flexible working hours, various events, entertainment, food, juices, etc.

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.