A sickle transition-rate model with starting threshold

Francesco Billari

Statistical Methods & Applications, 2001, vol. 10, issue 1, No 12, 139-155

Abstract: Abstract Billari (2001) introduced a new type of single-spell parametric transition-rate model: transition-rate models with a starting threshold. In such models, the transition-rate function is composed of two additive terms. The first term is a constant that holds for any given duration; the second is a ‘traditional’ transition-rate function with the threshold as its time origin, and it is added after a certain threshold point. The possibility of allowing for the presence of long-term survivors in the social process has not yet been dealt with, and it is of specific interest in several domains of application. In this paper, we develop the specific case of the sickle model. We discuss its features, its implementation as a starting threshold model, and the estimation of its parameters. The sickle model with starting threshold is then applied to the union formation of Italian men and women, using the Fertility and Family Survey data.

Keywords: Event history analysis; statistical demography; starting threshold; sickle model; long-term survivors; union formation; marriage life course; Italy (search for similar items in EconPapers)
Date: 2001
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DOI: 10.1007/BF02511645

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