Abstract In the light of the planned changes involving the inclusion of periods of employment on grounds other than the employment relationship in the seniority, the author analyzes the issue of seniority from a theoretical perspective. This article shows the essence of seniority and its impact on employee rights. The author presents possible normative approaches to the relationship between seniority and employee rights in a model approach. The aim of the article is also to show how the planned changes translate into employment issues in general.

The Article aims to present and characterize phenomenon of crunch, which occurs in IT industry, especially in video game producers and its influence on employment relationships. The period of crunch, leads to unusual employees involvement in process of work. Even though is possible according to polish legal system, it should correspond appropriate provisions. The main aim of this article is showing legal restrictions of crunch in the polish labour law system. The first of all this dissertation answers the question: does the phenomenon of crunch could be a condition of work in overtime hours? and: what are the legal limitations in terms of overtime working hours during the crunch period? The author presents also relations between crunch and guarantees of daily and weekly rest of work, working at night and work on Sundays and holidays.

The article presents the situation of company-level collective agreements in relation to collective bargaining in general. It focuses on normative and statistical aspects, presenting the numbers of concluded and binding agreements, as well as attempting to assess the approximate number of employees and other persons covered by collective agreements (including the situation in particular provinces). This is a starting point for the assessment of the potential and the actual role collective agreements play in shaping the employment conditions, especially when facing the complete collapse of multi-establishment collective agreements. The presented data is the result of a study conducted at Regional Labour Inspectorates and of analyses and reports conducted by the General Labour Inspectorate.