This article analyzes the efficiency of coaches in the Top Spanish Basketball League and what determines this efficiency. To accomplish this, a stochastic production function is estimated. Among others, the inefficiency determinants considered are whether the coach is an ex-professional player and whether he is from Spain. The results demonstrate that foreign coaches are more efficient. To build upon these results, a new approach to estimate the efficiency of coaches, in which efficiency is obtained by comparing their performance with expectations attained from betting odds, is proposed. The results were principally reinforced.
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