The modularty of agreement variation

In this article, following Ormazabal & Romero (2022) insights, a modular approach to agreement variation is proposed where syntactic relations are uniform, dialectal variation is determined in morphology, and extragrammatical modules deal with sociolinguistic variation. While dialectal variation is systematic, dependent on hierarchical relations, and occurs within linguistic communities; sociolinguistic agreement variation is arbitrary, linearly determined, and subject to socioeconomic and educational pressures.