Sample Case Study In Event History

Introduction
An event history may be defined as a long time record of the mastery of the incidence of different types of events. A good example include hire histories that usually comprise periods of different changes in work status, and corporation accounts that normally contain the commencement and final periods of co-residential relations. In a study of occupation histories, concern measures may be the completion of work or joblessness period. Whereas during analysis partnership histories may study the beginning of marriage and marital termination.
Event history study is used to analyze the period up until the happening of the specific event of concern. The period is measured since the stage of risk exposure of experiencing the event. For

In this case, we imagine that event periods are realization of a random variable T.
Survivor function represent the likelihood that no event has taken place before time t:
Persons who have not gone through the event have ‘survived’. The counterpart of the survivor function is called the cumulative distribution function, which is the likelihood that an event happens before t.
Age during first partnership
We explain the approximation of the above-mentioned functions in a study of age at first partnership that involves marriage and staying together among 500 respondents from the study of citizens born in Britain in a single week of 2013. The period of interest is showed by the total of years from the age of 16 and the beginning of first relationship. The sample size comprises of 35 persons who do not have partners by the age of 33, therefore, their duration are right censored. Using the estimate, we can see that 4.2% of the individuals who did not form their first partnership at 16 formed at the age of 17. Referring to the survivor function, 94% did not have partners at the age of 18 and 7.8% still did not have partners at the age of