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EN
The article presents the results of the duration analysis for 21,163 enterprises (natural persons conducting economic activity) established in the Łódzkie Voivodship in 2010 and observed until December 31, 2015. The Kaplan-Meier estimation of the survival function, the Cox proportionalhazards model and the recursive partitioning method (the CTree algorithm) are applied to achieve the goal of the conducted research i.e. to answer the following question: does the type of business activity and location of the enterprise affect its duration? Prediction error curves based on the bootstrap crossvalidation estimates of the prediction error are used to assess and compare predictions obtained from all three models. On the basis of the analysis results it can be assumed that the type of business activity makes firms more varied due to their duration compared to their location.
EN
The aim of the paper is to determine the influence of sex, age and education on the probability of exit from the registered unemployment in Szczecin. For the purposes of the study, the authors employed the survival analysis method, where they used survival trees built on the basis of the Kaplan-Meier estimators and adopted the statistic of the log-rank test as the splitting criterion. The research analysed the two most frequent reasons for deregistration, namely starting a job and the unemployed person’s failure to meet the conditions for being registered as unemployed. In addition, the study extracted subgroups of persons whom it took shortest and longest to start a job or deregister from a labour office. The analysis was based on the microdata from the Powiat Labour Office in Szczecin concerning persons who registered as unemployed in 2013 and were monitored until the end of 2014. The calculations were made in the R computer programme, using the partykit package and the ctree function. The research demonstrated that the probability of deregistration from the unemployment register because of finding a job depends solely on the age and education of the unemployed person, while the probability of getting removed from the unemployment register – on the two former determinants plus sex.
PL
Celem artykułu jest ustalenie wpływu płci, wieku i wykształcenia na prawdopodobieństwo wyjścia z bezrobocia rejestrowanego w Szczecinie. Na potrzeby badania zastosowano metodę analizy trwania. W tym celu wykorzystano drzewa przeżycia zbudowane w oparciu o estymatory Kaplana-Meiera, a za kryterium podziału przyjęto statystyki testu log-rank. Analizowano dwie najczęstsze przyczyny wyrejestrowywania z urzędu pracy – podjęcie pracy oraz wykreślenie z przyczyn leżących po stronie osoby bezrobotnej. Wyodrębniono podgrupy osób podejmujących pracę oraz rezygnujących z pośrednictwa urzędu pracy w najkrótszym i najdłuższym czasie. Analizę oparto na danych indywidualnych z Powiatowego Urzędu Pracy w Szczecinie. Dotyczyły one osób zarejestrowanych w 2013 r. i obserwowanych do końca 2014 r. Obliczenia przeprowadzono w programie R, korzystając z pakietu partykit, funkcji ctree. Z badania wynika, że prawdopodobieństwo wyłączenia z ewidencji bezrobotnych z powodu podjęcia pracy zależało tylko od wieku i wykształcenia, natomiast z powodów leżących po stronie osoby bezrobotnej było warunkowane przez płeć, wiek oraz wykształcenie.
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