Jennifer Wilcock

BEng Nottingham, MSc(Eng) Leeds, BA(Hons) MSc Auckland

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Doctoral Candidate - Doctor of Philosophy

Biography

I have now completed my PhD at the University of Auckland.

My thesis "Semiparametric efficiency of the profile likelihood estimator for population-based case-control studies: a correction of earlier proofs" was done under the supervision of Professor Alan Lee.

I am now a Postdoctoral Fellow in Statistics at Massey University, Palmerston North, where I am a member of the research team of Professor Martin Hazelton, working on the project "Lattice polytope samplers: theory, methods, and applications".

Research | Current

The abstract of my PhD thesis is as follows:

"We demonstrate the semiparametric efficiency of the profile likelihood estimator for population-based case-control studies. We consider in detail four particular designs: the two-phase population-based case-control design (Scott and Wild, Biometrika, 1997), the multi-phase population-based case-control design (Lee, Scott and Wild, Biometrika, 2010), the population-augmented case-control design (Hsieh, Manski and McFadden, Journal of the American Statistical Association, 1985), and the two-stage case-control design (Breslow and Cain, Biometrika, 1988). The efficiency of the estimator for the first three of these designs is explicitly shown and the approach taken can be applied to a general class of designs of which these are members.

The results in this thesis are shown to supersede earlier published claims to have demonstrated the semiparametric efficiency of these estimators and, as a consequence, the results in this thesis provide the first complete proof of their semiparametric efficiency.

The approach taken is based on extending a nonparametric convolution theorem to cover the case of "multi-sample" models, and then establishing the efficiency of each estimator by demonstrating that the influence function of the estimator is an element of the tangent space."

 

Areas of expertise

Semiparametric efficiency theory

Profile likelihood estimation

Methods for population-based and multi-phase case-control studies

 

Selected publications and creative works (Research Outputs)

  • Wilcock, J. L. (2/12/2013). Publication patterns: A co-citation network for biometrics, 1993-2013. Poster presented at International Biometric Society Australasian Region Conference, Mandurah, WA, Australia. Related URL.
  • Wilcock, J. L. (25/11/2013). Publication patterns: A co-citation network for biometrics, 1993-2013. Poster presented at 2013 Joint New Zealand Statistical Association and Operations Research Society of New Zealand Conference, Hamilton, NZ. Related URL.
  • Wilcock, J. L., & Lee, A. J. (2011). Efficiency of the profile likelihood estimator for case-control studies under general misspecification. Paper presented at Joint Statistical Meetings (JSM) 2011, Miami, USA. Related URL.
    Other University of Auckland co-authors: Alan Lee
  • Lee, A. J., & Wilcock, J. L. (2010). The Scott-Wild estimate is efficient under general misspecification: A projection approach. Paper presented at 19th International Workshop on Matrices and Statistics, Shanghai, China. 5 June - 8 June 2010. Related URL.
    Other University of Auckland co-authors: Alan Lee
  • Wilcock, J. L., & Lee, A. J. (1/9/2009). Frequency matching and balance as design strategies in case control studies. Poster presented at International Conference of the Royal Statistical Society, Edinburgh, Scotland. Related URL.
    Other University of Auckland co-authors: Alan Lee
  • Wilcock, J. L., & Lee, A. J. (1/1/2008). A method for designing two-stage case-control studies. Poster presented at Australian Statistical Conference 2008, Melbourne, Australia.
    Other University of Auckland co-authors: Alan Lee
  • Wilcock, J. L., & Lee, A. J. (2007). Comparison of optimal and balanced two-stage case-control designs under cost contraints. Paper presented at New Zealand Statistical Association (NZSA) Conference, Christchurch, NZ. 4 July - 6 July 2007. Related URL.
    Other University of Auckland co-authors: Alan Lee
  • Wilcock, J. L., & Lee, A. J. (2007). The optimal design of two-stage case-control studies. Paper presented at International Biometric Society Australasian Region Conference, Coffs Harbour, Australia. 2 December - 6 December 2007.
    Other University of Auckland co-authors: Alan Lee

Contact details

Alternative contact

Massey email: j.wilcock@massey.ac.nz

My University of Auckland email still works and is checked regularly.