Hedibert F. Lopes

  1. Measuring the vulnerability of the Uruguayan population to vector-borne diseases via spatially hierarchical factor models.

    Authors: Hedibert F. Lopes, Alexandra M. Schmidt, Esther Salazar, Mariana Gómez, Marcel Achkar
    Subjects: Applications
    Abstract

    We propose a model-based vulnerability index of the population from Uruguay
    to vector-borne diseases. We have available measurements of a set of variables
    in the census tract level of the 19 Departmental capitals of Uruguay. In
    particular, we propose an index that combines different sources of information
    via a set of micro-environmental indicators and geographical location in the
    country.

  2. Particle Learning and Smoothing.

    Authors: Nicholas G. Polson, Carlos M. Carvalho, Michael S. Johannes, Hedibert F. Lopes
    Subjects: Methodology
    Abstract

    Particle learning (PL) provides state filtering, sequential parameter
    learning and smoothing in a general class of state space models. Our approach
    extends existing particle methods by incorporating the estimation of static
    parameters via a fully-adapted filter that utilizes conditional sufficient
    statistics for parameters and/or states as particles. State smoothing in the
    presence of parameter uncertainty is also solved as a by-product of PL. In a
    number of examples, we show that PL outperforms existing particle filtering
    alternatives and proves to be a competitor to MCMC.

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