A salary is the distribution of a guarantee (expected return or earnings from exclusively others) paid by an employer to an employee. As interest is paid to an investor for his investments, a salary is paid to the employee on his invested wealth (time, money, work, resources and thought). Some examples of wage distribution are compensations such as minimum wage, current wages and annual bonuses, as well as remunerations such as prices and tips. The employment contract law does not impose binding compensation elements. This means that the parties are free to decide what compensation is and how it is calculated. For example, compensation can be calculated on the basis of time (hourly wage, monthly wage) or workload (unit wage). Compensation is compensation agreed between the parties and paid by the employer to the worker for the performance of the work. Compensation must therefore be included in the worker`s employment contract, but it can also be agreed in the collective agreement. The annual salary analysis refers to several sources consisting of social declarations or administrative data. Information on the private sector comes from registered social declarations (NSDs) that follow annual Social Data Statements (DADS). Since 2009, information on the public service has come from the Public Service Information System (Siasp), mainly through monthly state salary records for public service employees of the State (SCS) and DADS, then by DSN, for civil servants (LCS), in the hospital public service (HCS) and in some public institutions under the jurisdiction of the SCS , is powered. For the purposes of federal withholding tax, 26 U.S.C s.
3401 (a) defines the term “wages” specifically for Chapter 24 of the Internal Income Code: compensation can only be changed by mutual agreement. Unilateral changes are only allowed if the salary is temporarily reduced, if it is not possible to give work. This can also be used when the employer is unable to work or has no financial means to pay normal pay. Before reducing pay, employees should be informed and consulted. If the worker does not agree with the decline, he has the right to end the employment relationship. As with redundancies, a benefit must be paid in this case. Depending on the structure and traditions of the different economies of the world, wage rates are influenced by market forces (supply and demand), labour organization, legislation and tradition. Market forces may be more dominant in the United States, while tradition, social structure and seniority may play a more important role in Japan.
 [Citation required] Salary is a kind of “price.” Reduced to a work unit that can be one hour (hourly wage) or a full-time equivalent (TDR salary), it allows comparison of jobs or jobs of different duration and work. In 2012, 75 million workers earned hourly wages in the United States, representing 59% of employment.  In the United States, the wages of most workers are determined by market forces or collective bargaining, where a union negotiates on behalf of workers. The Fair Labor Standards Act sets, among other things, a federal minimum wage that all states must comply with. Fourteen federal states and a number of cities have set their own federally-higher minimum wage rates.