The interaction of a manager's psychological type and the corporate cu
lture in which he or she works is explored, finding that certain psych
ological types predominate in certain cultures. The relationship is mo
st pronounced amongst senior managers and can lead to 'type homogeneit
y' in top management teams. This tendency of managers of a similar psy
chological type to congregate and form homogeneous enclaves has a numb
er of implications for organizational effectiveness. Type homogeneity
may have positive consequences such as team harmony and cohesion, as w
ell as negative consequences like strategic myopia, unfairness in prom
otion and difficulty of culture change. These issues are discussed and
explored to provide a deeper understanding of how type and culture in
teract and the resulting consequences for organizational effectiveness
.