Sri Lanka's Department of Census and Statistics claims that the new index is based on the international 'classification of individual consumption by purpose' or COICOP.
But one of the eleven expenditure groups in the classification which contains alcohol and tobacco has been completely dropped from the basket. In Sri Lanka alcohol and tobacco are taxed heavily and have tended to increase in price.
Technical Practice
At a recent seminar about the index, the highly respected former head of statistics of Sri Lanka's central bank, Anila Dias Bandaranaike, suggested that authorities include dropped items in the index.
"It is very timely that the Statistics Department has revised the index to reflect the data from the latest consumer surveys," she said.
"But if we are fo