Title
Fast ε-free Inference of Simulation Models with Bayesian Conditional Density Estimation.
Abstract
Many statistical models can be simulated forwards but have intractable likelihoods. Approximate Bayesian Computation (ABC) methods are used to infer properties of these models from data. Traditionally these methods approximate the posterior over parameters by conditioning on data being inside an e-ball around the observed data, which is only correct in the limit e→0. Monte Carlo methods can then draw samples from the approximate posterior to approximate predictions or error bars on parameters. These algorithms critically slow down as e→0, and in practice draw samples from a broader distribution than the posterior. We propose a new approach to likelihood-free inference based on Bayesian conditional density estimation. Preliminary inferences based on limited simulation data are used to guide later simulations. In some cases, learning an accurate parametric representation of the entire true posterior distribution requires fewer model simulations than Monte Carlo ABC methods need to produce a single sample from an approximate posterior.
Year
Venue
Field
2016
NIPS
Approximate Bayesian computation,Monte Carlo method,Inference,Bayesian linear regression,Posterior probability,Parametric statistics,Artificial intelligence,Statistical model,Machine learning,Mathematics,Bayesian probability
DocType
Citations 
PageRank 
Conference
3
0.40
References 
Authors
0
2
Name
Order
Citations
PageRank
George Papamakarios1255.25
Iain Murray2122.62