Head movement to specifier positions

Syntactic movement of phrases, modeled in terms of Internal Merge, has traditionally been distinguished on empirical grounds from syntactic movement of heads, modeled by other means. I demonstrate that, once the class of head movements implicated in word formation is excluded from consideration (assumed to be, for example, post-syntactic, following Harizanov & Gribanova 2019), the residue of head movements, which are purely syntactic in nature, and phrasal movement can receive a unified treatment. Both phrasal and syntactic head movement are implemented here as instances of Internal Merge (following, for example, Fukui & Takano 1998; Toyoshima 2001; Matushansky 2006; Vicente 2007; 2009). This treatment of syntactic head movement renders long-standing stipulations about structure building such as the Chain Uniformity Condition superfluous. It also makes sense of the properties of syntactic head movement, as demonstrated in a case study of participle fronting in Bulgarian, which targets a specifier position, violates the Head Movement Constraint, can cross finite clause boundaries, and can have discourse effects.