# Example. Replication of results in Grifell-Tatjé and Lovell (1999, p. 100).
data("Grifell_Lovell_1999")
data_example <- read_malmquist(Grifell_Lovell_1999,
percol=1,
dmus = 2,
inputs = 3,
outputs = 4,
arrangement="vertical")
result_fgnz <- malmquist_index(data_example,
orientation= "oo",
rts="vrs",
type1 = "cont",
type2 = "fgnz")
result_fgnz$mi
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