Chapter 5 investigate an extensive number of variables which might potentially exert some influence on variant selection in the spelling of English compounds. These variables concern different areas of language, namely spelling, length, frequency, phonology, morphology, grammar, semantics, diachronic aspects like age of the compound, discourse aspects like regional variation, systemic aspects like analogy and also some extra-linguistic aspects like economy. Eventually, the specific variables are combined into super-variables such as heterogeneity or complexity of the constituents. In order to increase readability and to avoid repetition, the full empirical analysis for the investigated variables is given in subsections introducing the hypothesis, method, results and discussion each, including a discussion of the findings of the present study in relation to the findings of previous research. There is an overview of the coded variables, and summaries at the end of each larger block give an overview of the most important results.