TY - GEN N1 - Econometrics = Ekonometria, 2019, Vol. 23, No. 3, s. 59-75 N2 - In a duration analysis of enterprises, as a rule there are determined four basic functions related to the time of their duration, i.e.: the density function; the distribution function; the survival function, and the hazard function. It turns out that the hazard function and its cumulative version are the key to understanding modern survival analysis. The aim of the paper is to indicate the best method of the estimation of the values of individual functions in survival analysis based on other functions. The paper provides compiled and classified information on particular functions used in the non-parametric duration analysis of enterprises. It examines some theoretical and practical problems related to the determination of, among others, the hazard function and the cumulative hazard function on the basis of data in cohort tables and the results of the estimation of the survival function with the use of the Kaplan- Meier method. The considerations included in the paper are illustrated with the results of analyses for enterprises established in the Łódzkie Voivodeship in 2001-2015 (including those which went into liquidation) L1 - http://www.dbc.wroc.pl/Content/72801/Mikulec_The_hazard_function_and_its_role.pdf M3 - artykuł L2 - http://www.dbc.wroc.pl/Content/72801 PY - 2019 KW - enterprises KW - duration analysis KW - hazard function KW - cumulative hazard function KW - mean absolute percentage error KW - przedsiębiorstwa KW - analiza trwania KW - funkcja hazardu KW - skumulowana funkcja hazardu KW - średni absolutny błąd procentowy C1 - Pewne prawa zastrzeżone na rzecz Autorów i Wydawcy A1 - Mikulec, Artur PB - Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu C6 - Dla wszystkich zgodnie z licencją LA - eng CY - Wrocław ID - DOI: 10.15611/eada.2019.3.06 T1 - The hazard function and its role in a non-parametric duration analysis of enterprises in the Łódzkie Voivodeship UR - http://www.dbc.wroc.pl/dlibra/publication/edition/72801 T2 - Funkcja hazardu i jej znaczenie w nieparametrycznej analizie trwania przedsiębiorstw w województwie łódzkim ER -