Work (Right) For other uses, see Labor. The work and social relations it generates, is and has been subject to multiple legal frames. Historically, for thousands of years, the dominant form of relationship of people because of the work was slavery. Slavery is a property relationship, the worker is considered a thing (a slave), owned by one person (the master). The owner, as owner of the thing, have the right to use and sell at its sole discretion, and appropriate the fruits of their labor. In a no bonded labor market, but market of people (human trafficking). From the nineteenth century, slavery began to cease to be the dominant form of work, a process related to the development of trade unionism and democracy. However, contrary to popular belief, slavery has not disappeared and remains under old and new forms of forced labor on large sections of the working world even in developed countries.Currently the dominant form is wage labor, or work as an employee, or paid employment. The worker or "employee", is recognized as a party like this is going to use your work ("Employer"). The relationship is formalized through a contract (employment contract) in establishing the price and the conditions under which the work will be performed. The price of labor is called "salary" or "pay", and is usually paid daily (wages), biweekly (weeks) or monthly (salary). The area in which it offered, demand and contracts are realized is called labor market. The employer hires a worker or workers to use their work in an organized productive activity, generally with the intention of making a profit. The organization of human resources (labor) and materials (capital) with a view to producing a value-added is called "firm."In modern societies, workers are inclined to join in groups (unions) to collectively negotiate employment contracts (collective bargaining agreement), either directly with the employer for a single company, or an organized group of employers for an industry or trade. Moreover wage labor is specifically protected by labor law, national and international, which sets minimum levels required to be included in all contracts of employment. Apart from employment there is a wide range of ways of working with different legal statuses. The self-employment, also known as self-employment, which is the worker who directs and organizes its activity, and that can take two basic forms: A) The individual self or self-employment, which is regulated by civil law usually in the form of "contract of lease services" (liberal professions, trades, self, etc).B) The collective self, which the employee serves in an organization of which it forms part as a full member in the decision-making (production cooperative or work, working society, etc). The work "informal" dependency ratio, also called the work "unregistered" work "black" or work "without a contract." It is characterized by form of employment without fulfilling the legal formalities. Conforma relations in which the work is usually completely unprotected against the employer in a position of weakness maximum and minimum (or no) bargaining power, which place it close to slavery. This type of work has grown significantly in recent years.Today many large companies use a human resources system that combines the maintenance procedures of a small group "employee" formal directly employed by the company with a large group of workers in companies performing "mercerized" (outsourcing), often in informal conditions without job protection. One of the commonly accepted interpretations of the existence of informal activities refers to their development outside the existing regulatory system. That is, work is taking place without complying with the requirements of the regulations, whether laws or procedures. Ed Young Moreover, in a more positive view, the exclusion is associated with lack of access to policy development and in particular, cr, training and markets. This approach emphasizes the informal sector as the primary characteristic is unlawful and tends to view it as a set of covert activities or submerged in the economy. The reality is, however, more nuanced.Neither the informal sector operates entirely "black" or its opposite, the modern sector, it does so with an unqualified adherence to the law.