Search Results for author: David T. Frazier

Found 8 papers, 1 papers with code

Solving the Forecast Combination Puzzle

no code implementations10 Aug 2023 David T. Frazier, Ryan Covey, Gael M. Martin, Donald Poskitt

In addition, we demonstrate that the low power of such predictive accuracy tests in the forecast combination setting can be completely avoided if more efficient estimation strategies are used in the production of the combinations, when feasible.

Misspecification-robust Sequential Neural Likelihood for Simulation-based Inference

no code implementations31 Jan 2023 Ryan P. Kelly, David J. Nott, David T. Frazier, David J. Warne, Chris Drovandi

Simulation-based inference techniques are indispensable for parameter estimation of mechanistic and simulable models with intractable likelihoods.

Uncertainty Quantification

Weak Identification in Discrete Choice Models

no code implementations13 Nov 2020 David T. Frazier, Eric Renault, Lina Zhang, Xueyan Zhao

We study the impact of weak identification in discrete choice models, and provide insights into the determinants of identification strength in these models.

Discrete Choice Models

Decomposing Identification Gains and Evaluating Instrument Identification Power for Partially Identified Average Treatment Effects

no code implementations6 Sep 2020 Lina Zhang, David T. Frazier, D. S. Poskitt, Xueyan Zhao

This paper examines the identification power of instrumental variables (IVs) for average treatment effect (ATE) in partially identified models.

Approximate Maximum Likelihood for Complex Structural Models

no code implementations18 Jun 2020 Veronika Czellar, David T. Frazier, Eric Renault

This new approach is based on using a constrained approximation to the structural model, which ensures identification and can deliver estimators that are nearly efficient.

Efficient Bayesian synthetic likelihood with whitening transformations

no code implementations11 Sep 2019 Jacob W. Priddle, Scott A. Sisson, David T. Frazier, Christopher Drovandi

Bayesian synthetic likelihood (BSL) is a popular such method that approximates the likelihood function of the summary statistic with a known, tractable distribution -- typically Gaussian -- and then performs statistical inference using standard likelihood-based techniques.

Bayesian Inference

Robust Approximate Bayesian Inference with Synthetic Likelihood

1 code implementation9 Apr 2019 David T. Frazier, Christopher Drovandi

Similar to other approximate Bayesian methods, such as the method of approximate Bayesian computation, implicit in the application of BSL is the maintained assumption that the data generating process (DGP) can generate simulated summary statistics that capture the behaviour of the observed summary statistics.

Methodology Applications Computation

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