“…The availability of measures of state-specific school centralisation suggests that a cross-section study which seeks to explain an efficiency measuresay unit costsas a function of, amongst other things, organisational structure, might be instructive. In spite of the imperfections of the indices of school autonomy, such an analysis ought to be able, at the least, to tell us whether an optimal level of centralisation existsor, on the other hand, whether a monopoly of truth is enjoyed by either the 'hyper-rationalists' or the 'romantic decentralists' (Timar and Kirp, 1988). Organisational structure is not, of course, the only factor which influences costs.…”