A Worrying Analysis of Probabilistic Time-series Models for Sales Forecasting

Probabilistic time-series models become popular in the forecasting field as they help to make optimal decisions under uncertainty. Despite the growing interest, a lack of thorough analysis hinders choosing what is worth applying for the desired task. In this paper, we analyze the performance of thre...

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Published in:arXiv.org 2020-11
Main Authors: Jung, Seungjae, Kyung-Min, Kim, Kwak, Hanock, Young-Jin, Park
Format: Article
Language:English
Subjects:
Forecasting
Multilayers
Probabilistic models
Regression analysis
Sales
Sales forecasting
Statistical analysis
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Kyung-Min, Kim
Kwak, Hanock
Young-Jin, Park
description Probabilistic time-series models become popular in the forecasting field as they help to make optimal decisions under uncertainty. Despite the growing interest, a lack of thorough analysis hinders choosing what is worth applying for the desired task. In this paper, we analyze the performance of three prominent probabilistic time-series models for sales forecasting. To remove the role of random chance in architecture's performance, we make two experimental principles; 1) Large-scale dataset with various cross-validation sets. 2) A standardized training and hyperparameter selection. The experimental results show that a simple Multi-layer Perceptron and Linear Regression outperform the probabilistic models on RMSE without any feature engineering. Overall, the probabilistic models fail to achieve better performance on point estimation, such as RMSE and MAPE, than comparably simple baselines. We analyze and discuss the performances of probabilistic time-series models.
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subjects Forecasting
Multilayers
Probabilistic models
Regression analysis
Sales
Sales forecasting
Statistical analysis
title A Worrying Analysis of Probabilistic Time-series Models for Sales Forecasting
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