The RBI should not be overly concerned about retail inflation target of 4 per cent as the targeting may lead to decline in output, affecting growth, SBI'’ chief economist said on Friday. “RBI should not be overly concerned about CPI inflation to be at 4 per cent. As it has a plus/minus bias of 2 per cent so if inflation moved in from 4 per cent to 6 per cent it is fine,” SBI Group Chief Economic Adviser Soumya Kanti Ghosh said at an interactive session here on Friday. “So even if it moves to 5-5.5 per cent for some period of time it is not going to harm. It there is an inflation targeting then there is a decline in output (over the period of time),” he said. He also cited empirical evidence suggesting that inflation targeting countries, which tend to disinflate rapidly in the initial years, tend to witness a decline in output that affects growth.