Demonstrates a link between how languages are used and the conventions of their grammars. This book sets out a theory in which performance shapes grammars and accounts for the variation patterns found in the world's languages. It is of interest to researchers in linguistics, psycholinguistics, computational linguistics and cognitive science.

John Hawkins demonstrates a clear link between how languages are used and the conventions of their grammars. He sets out a theory in which performance shapes grammars and accounts for the variation patterns found in the world's languages. He backs this up with evidence from a wide array of languages. He also considers the profound consequences of this correspondence for explanations of language change and evolution, and for models of performance and acquisition. His book is of fundamental importance for linguistic theory.

Hawkins argues that grammars are profoundly affected by the way humans process language. He develops a simple but elegant theory of performance and grammar by drawing on concepts and data from generative grammar, linguistic typology, experimental psycholinguistics and historical linguistics. In so doing, he also makes a laudable attempt to bridge the schism between the two research traditions in linguistics, the formal and the functional. Efficiency and Complexity in Grammars is a major contribution with far-reaching consequences and implications for many of the fundamental issues in linguistic theory. This is a tremendous piece of scholarship that no linguist can afford to neglect.