Badanie kohort firm w analizie trwania

The aim of the study has a theoretical and researching character. The first part includes the presentation of scientific achievements in foreign and Polish literature and the authorial systematics of methods of firms’ life duration analysis (statistical and econometric study of firms cohorts). Methods of data censoring are discussed. The empirical part presents examples of the results of economic entities established in the Zachodniopomorskie Voivodship in 2009−2011 (cohort) and observed until 31 December 2013.The study of firms cohorts, such as human cohorts, are carried out using the methods of survival analysis (duration). The paper presents the possibility of using duration tables and intensity function (hazard) of firm’s liquidation. This function can take a typical inverted U-shape.