Abstract
When input prices are available, cost efficiency, also known as input overall efficiency, or input allocative efficiency (as proposed by Färe et al., 1985) can be estimated. Alternatively, when output prices are available, revenue efficiency, also known as output overall efficiency, or output allocative efficiency (as proposed by Färe et al., 1985) can be estimated. Lastly, when both input and output prices are available, profit efficiency or profit allocative efficiency (as proposed by Chambers et al., 1998) can be estimated.