ASA theory is one of the most important explanations of behaviour in organisations. Developed by Professor Ben Schneider, it is the idea that organisations contain similar types of people because they attract, select and retain people similar to those already employed by the organisation. This homogeneity explains why organisations are different to each other. Although a lot is known about attrition, little is known about the attraction and selection phases. This book contains a series of empirical studies that explore whether organisations attract and select people who hold the values of the people already employed by the organisation. The results of these studies cast doubt on how universal ASA theory might be and suggest that the initial employment decisions that people make are more about choosing their vocation than their employer.