“…Similarly, we used non-performing loans as undesirable carryovers. The undesirable output from period t − 1 is b (t−1,t) p (2,1) j (p (2,1) = 1, 2, · · · , q (2,1) ), where b (t−1,t) p (2,1) j are undesirable carryovers from the preceding (current) period to the current (subsequent) period and superscripts (1,2) and (2,1) indicate that these indicators are from the deposit (loan) stage to the loan (deposit) stage, respectively. In the loan stage, each bank in period t uses intermediate products z (t) p (1,2) j obtained from the deposit stage and c (t−1,t) p 2 j (p 2 = 1, 2, · · · , q 2 ) to produce output y (t) r 2 j (r 2 = 1, 2, · · · , s 2 ), c (t,t+1) p 2 j and b (t,t+1) p (2,1) j , where c (t,t+1) p 2 j and b (t,t+1) p (2,1) j are desirable and undesirable carryovers from the current period to the subsequent period, respectively.…”