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    Estimation of a regression spline sample selection model

    Marra, G. and Radice, Rosalba (2013) Estimation of a regression spline sample selection model. Computational Statistics & Data Analysis 61 , pp. 158-173. ISSN 0167-9473.

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    It is often the case that an outcome of interest is observed for a restricted non-randomly selected sample of the population. In such a situation, standard statistical analysis yields biased results. This issue can be addressed using sample selection models which are based on the estimation of two regressions: a binary selection equation determining whether a particular statistical unit will be available in the outcome equation. Classic sample selection models assume a priori that continuous regressors have a pre-specified linear or non-linear relationship to the outcome, which can lead to erroneous conclusions. In the case of continuous response, methods in which covariate effects are modeled flexibly have been previously proposed, the most recent being based on a Bayesian Markov chain Monte Carlo approach. A frequentist counterpart which has the advantage of being computationally fast is introduced. The proposed algorithm is based on the penalized likelihood estimation framework. The construction of confidence intervals is also discussed. The empirical properties of the existing and proposed methods are studied through a simulation study. The approaches are finally illustrated by analyzing data from the RAND Health Insurance Experiment on annual health expenditures.


    Item Type: Article
    Keyword(s) / Subject(s): Non-random sample selection, Penalized regression spline, Selection bias, Simultaneous equation system
    School: Birkbeck Faculties and Schools > Faculty of Business and Law > Birkbeck Business School
    Depositing User: Rosalba Radice
    Date Deposited: 28 May 2013 09:30
    Last Modified: 02 Aug 2023 17:04


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