Briefly describe the influence of trade union on wage level.

Answer: (1) Restrict labor supply. Trade unions can limit the quantity of labor supply by supporting immigration restrictions, shortening working hours, extending holidays, limiting the employment of child and female workers, high membership fees, refusing to accept new members, and reducing labor intensity, so as to make the labor supply curve rise along the labor demand curve and raise the wage level.

(2) The labor demand curve moves up. Trade unions can reduce commodity prices by improving labor productivity and helping manufacturers improve management, and ask the government to raise import taxes, restrict imports and expand exports, thus raising the labor curve and raising wages.

(3) Eliminate "monopoly exploitation by the buyer". When there is a buyer's monopoly in the labor market, the monopolist will push the salary below the competitive wage rate. This situation is exploitation monopolized by the buyer. Through the strength of the trade union, the buyer can be forced to raise wages, make MRP equal to wages, and eliminate "monopoly exploitation by the buyer".

(4) Asking the government to set a minimum wage standard can also keep wages at a certain level.