Browsing by Author "Ruggeri, Fabrizio"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    2021 International Statistical Institute Mahalanobis Award: A Tribute to Heleno Bolfarine
    (2021) Ruggeri, Fabrizio; Bolfarine, Henrique; Bazan, Jorge Luis; Arellano-Valle, Reinaldo B.; Lachos Davila, Victor Hugo; Castro, Mario
    The Government of India sponsors the Mahalanobis International Award, which, managed by the International Statistical Institute, is presented every other year at the International Statistical Institute World Statistics Congress. The Mahalanobis Award recognises an individual for lifetime achievements in statistics in a developing country or region. This article celebrates the 2021 winner, Prof. Heleno Bolfarine, who, unfortunately, passed away a few days before the award ceremony.
  • Thumbnail Image
    Item
    Bayesian first order auto-regressive latent variable models for multiple binary sequences
    (SAGE PUBLICATIONS LTD, 2011) Giardina, Federica; Guglielmi, Alessandra; Quintana, Fernando A.; Ruggeri, Fabrizio
    Longitudinal clinical trials often collect long sequences of binary data monitoring a disease process over time. Our application is a medical study conducted in the US by the Veterans Administration Cooperative Urological Research Group to assess the effectiveness of a chemotherapy treatment (thiotepa) in preventing recurrence on subjects affected by bladder cancer. We propose a generalized linear model with latent auto-regressive structure for longitudinal binary data following a Bayesian approach. We discuss inference as well as sensitivity to prior choices for the bladder cancer data. We find that there is a significant treatment effect in the sense that treated patients have much smaller predicted recurrence probabilities than placebo patients.