Stanza-GLM: Calibrated Non-Gaussian State-Space Forecasting with Nonlinear Latent Dynamics

Sayan Mukherjee1, George Buckle1
1Department of Statistical Science, Duke University, Durham, NC 27708
DOI: https://doi.org/10.71448/bcds2232-2
Published: 30/12/2022
Cite this article as: Sayan Mukherjee, George Buckle. Stanza-GLM: Calibrated Non-Gaussian State-Space Forecasting with Nonlinear Latent Dynamics. Bulletin of Computer and Data Sciences, Volume 3 Issue 2. Page: 13-21.

Abstract

A large fraction of computer and data science forecasting workloads involve discrete events and counts (clicks, orders, incidents), for which Gaussian emission models are inappropriate. We introduce Stanza-GLM, a nonlinear state-space framework that retains the interpretability and calibrated multi-horizon uncertainty of Stanza-like latent dynamics while generalizing the observation model to the exponential family (Poisson, Negative Binomial, Bernoulli). We develop efficient filtering and smoothing via iterated extended Kalman updates or Laplace moment matching, yielding reliable predictive intervals across horizons with optional conformal calibration. Across event- and count-heavy benchmarks, Stanza-GLM reduces predictive deviance and improves empirical coverage versus Gaussian emissions and deep sequence baselines while maintaining competitive runtime. Our ablations dissect the contribution of dynamic lag weights, dispersion, and inference choices, providing a practical recipe for production deployment in discrete-event time series.

Keywords: uncertainty calibration, conformal prediction, laplace approximation, dynamic lag weights

Abstract

A large fraction of computer and data science forecasting workloads involve discrete events and counts (clicks, orders, incidents), for which Gaussian emission models are inappropriate. We introduce Stanza-GLM, a nonlinear state-space framework that retains the interpretability and calibrated multi-horizon uncertainty of Stanza-like latent dynamics while generalizing the observation model to the exponential family (Poisson, Negative Binomial, Bernoulli). We develop efficient filtering and smoothing via iterated extended Kalman updates or Laplace moment matching, yielding reliable predictive intervals across horizons with optional conformal calibration. Across event- and count-heavy benchmarks, Stanza-GLM reduces predictive deviance and improves empirical coverage versus Gaussian emissions and deep sequence baselines while maintaining competitive runtime. Our ablations dissect the contribution of dynamic lag weights, dispersion, and inference choices, providing a practical recipe for production deployment in discrete-event time series.

Keywords: uncertainty calibration, conformal prediction, laplace approximation, dynamic lag weights
Sayan Mukherjee
Department of Statistical Science, Duke University, Durham, NC 27708
George Buckle
Department of Statistical Science, Duke University, Durham, NC 27708

DOI

Cite this article as:

Sayan Mukherjee, George Buckle. Stanza-GLM: Calibrated Non-Gaussian State-Space Forecasting with Nonlinear Latent Dynamics. Bulletin of Computer and Data Sciences, Volume 3 Issue 2. Page: 13-21.

Publication history

Copyright © 2022 Sayan Mukherjee, George Buckle. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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