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    <titleInfo>
        <title>On the Complexity and Typology of Inflectional Morphological Systems</title>
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    <name type="personal">
        <namePart type="given">Ryan</namePart>
        <namePart type="family">Cotterell</namePart>
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    <name type="personal">
        <namePart type="given">Christo</namePart>
        <namePart type="family">Kirov</namePart>
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    <name type="personal">
        <namePart type="given">Mans</namePart>
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    <name type="personal">
        <namePart type="given">Jason</namePart>
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    <abstract>We quantify the linguistic complexity of different languages’ morphological systems. We verify that there is a statistically significant empirical trade-off between paradigm size and irregularity: A language’s inflectional paradigms may be either large in size or highly irregular, but never both. We define a new measure of paradigm irregularity based on the conditional entropy of the surface realization of a paradigm— how hard it is to jointly predict all the word forms in a paradigm from the lemma. We estimate irregularity by training a predictive model. Our measurements are taken on large morphological paradigms from 36 typologically diverse languages.</abstract>
    <identifier type="citekey">cotterell-etal-2019-complexity</identifier>
    <identifier type="doi">10.1162/tacl_a_00271</identifier>
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        <url>https://aclanthology.org/Q19-1021</url>
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    <part>
        <date>2019</date>
        <detail type="volume"><number>7</number></detail>
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            <start>327</start>
            <end>342</end>
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%0 Journal Article
%T On the Complexity and Typology of Inflectional Morphological Systems
%A Cotterell, Ryan
%A Kirov, Christo
%A Hulden, Mans
%A Eisner, Jason
%J Transactions of the Association for Computational Linguistics
%D 2019
%V 7
%I MIT Press
%C Cambridge, MA
%F cotterell-etal-2019-complexity
%X We quantify the linguistic complexity of different languages’ morphological systems. We verify that there is a statistically significant empirical trade-off between paradigm size and irregularity: A language’s inflectional paradigms may be either large in size or highly irregular, but never both. We define a new measure of paradigm irregularity based on the conditional entropy of the surface realization of a paradigm— how hard it is to jointly predict all the word forms in a paradigm from the lemma. We estimate irregularity by training a predictive model. Our measurements are taken on large morphological paradigms from 36 typologically diverse languages.
%R 10.1162/tacl_a_00271
%U https://aclanthology.org/Q19-1021
%U https://doi.org/10.1162/tacl_a_00271
%P 327-342

Markdown (Informal)

[On the Complexity and Typology of Inflectional Morphological Systems](https://aclanthology.org/Q19-1021) (Cotterell et al., TACL 2019)

• On the Complexity and Typology of Inflectional Morphological Systems (Cotterell et al., TACL 2019)

ACL

• Ryan Cotterell, Christo Kirov, Mans Hulden, and Jason Eisner. 2019. On the Complexity and Typology of Inflectional Morphological Systems. Transactions of the Association for Computational Linguistics, 7:327–342.