This paper argues that corruption, in terms of bribes and kickbacks, i
s primarily generated by firms due to regulatory conditions. To recove
r the cost of bribery, firms hide their production output which then r
emains unrecorded in the official statistics. Hence, by estimating the
unrecorded income of the industrial sector, it is possible to examine
the growth of corruption. A method for estimating sectoral unrecorded
income is suggested in this paper, and from the estimated unrecorded
income of the industrial sector we demonstrate that the large increase
s in corruption signalled by recent reported cases are justifiable. Ou
r empirical results also suggest that the disaggregated 'hidden econom
y' estimates are more informative than aggregated estimates.