"Reciprocity also helps address the old problem of asymmetric adjustment of global imbalances. Suppose a deficit country wishes to contain the supply of credit and build resilience in its financial system by raising the buffer. If a surplus country whose banks are lending to the deficit country reciprocates, its banks should be incentivised to lend less to the deficit economy, and more to their domestic economy. That should increase domestic demand in the surplus country, and hence demand for deficit country exports, reducing the overall level of imbalances."