Chief Economic Adviser to the Ministry of Finance Kaushik Basu said the Reserve Bank followed conventional methods of raising interest rates to tame inflation which do not seem to have worked. Talking to reporter in Kolkata Mr Basu said he expressed concern about the use of traditional methods by RBI for anti-inflationary monetary policy to contain prices. He said that the RBI followed the text-bookish way to announce monetary policy.The central bank has hiked interest rates 13 times since March 2010 in its bid to tame inflation. Basu said raising interest rates to suck out liquidity from the system would have disastrous effect on the economy. On the persistent high food prices, he said the food inflation is likely to come down in three weeks time and overall inflation by the December end.