ABSTRACT. In this article, we examine the current situation of studies that concentrate on the study of morphological variation in Spanish. We start discussing the place of morphology in current linguistic theory, and what its different aspects are, a question that is previous to the identification of the relevant phenomena. §2 provides an overview of the situation of variationist studies in Spanish, and §3 presents the main morphological variation phenomena. §4 introduces in the picture the different approaches to variation that are currently discussed in the relevant literature. We close with an overview of the articles included in this volume.Highlights:• The study of morphological variation is complicated by the difficulty of finding an autonomous definition of morphology • Morphological variation phenomena frequently are visible at the mapping between syntax and phonology or syntax and semantics • Spanish exhibits a wide range of variation phenomena that affect, in one sense or the other, the morphological expression of units • Both macro-and micro-parametric approaches have been proposed in order to capture morphological variation
Morphological variationIn order to explain what 'morphological variation' means, it is necessary first to define what is understood by 'morphology' and 'variation'. This proves not to be an easy task, as the many different approaches show, both with respect to morphology (cf. Halle 1973;Siegel 1974;Aronoff 1976Aronoff , 1994Bauer 1978;Booij 1977; Lieber 1980Lieber , 1992Lieber , 2004Lapointe 1980;Selkirk 1982; Scalise 1983;Anderson 1992;Halle & Marantz 1993, Marantz 1995, to cite only some of the most influential works) and variation (cf. Baker 1996, 2001, Belletti & Rizzi 1996, Biberauer 2008, Biberauer et al. 2010, Borer 1984, Chomsky 1981, Kayne 2000, Newmeyer 2004, Roberts & Holmberg 2005, keeping things to a few relevant works).Let's start with morphology. Traditional definitions were based on the assumption that words and phrases are ontologically different objects: morphology was the science that studied the issues that had to do with words (including their grammatical properties, their phonology and their semantics), while syntax studied the same range of issues but in word combinations, that is, phrases. However, relatively recent 1 We are grateful to Víctor Acedo and Peter Svenonius for comments and feedback. Antonio Fábregas' research is financed by projects PICS 6422 (Deverbative) and FFI2013-41509-P (Information and argument structure). Ángel J. Gallego