Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regional Topics in British Grocery Retail Transactions   Understanding the customer behaviours behind transactional data has high
commercial value in the grocery retail industry. Customers generate millions of
transactions every day, choosing and buying products to satisfy specific
shopping needs. Product availability may vary geographically due to local
demand and local supply, thus driving the importance of analysing transactions
within their corresponding store and regional context. Topic models provide a
powerful tool in the analysis of transactional data, identifying topics that
display frequently-bought-together products and summarising transactions as
mixtures of topics. We use the Segmented Topic Model (STM) to capture customer
behaviours that are nested within stores. STM not only provides topics and
transaction summaries but also topical summaries at the store level that can be
used to identify regional topics. We summarised the posterior distribution of
STM by post-processing multiple posterior samples and selecting semantic modes
represented as recurrent topics. We use linear Gaussian process regression to
model topic prevalence across British territory while accounting for spatial
autocorrelation. We implement our methods on a dataset of transactional data
from a major UK grocery retailer and demonstrate that shopping behaviours may
vary regionally and nearby stores tend to exhibit similar regional demand.

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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: math