The finance ministry plans to bring out detailed income tax ( I- T) data annually, in response to criticism by economist Thomas Piketty over lack of public I- T statistics in India. After almost 16 years, the revenue department last week made public three sets of data related to direct taxes, including time series data since 2001- 02. The detailed analysis of I- T statistics, based on returns filed, was for 2011- 12 alone. Piketty, economist and author of Capital in the Twenty- First Century, told Business Standard the data released by the government were too limited to draw significant inferences. “ The government released detailed data by income range only for 20122013 ( assessment year). To study the evolution of income distribution, we would need detailed data by income range for all years. Iam looking forward to see this data,” he said in an emailed response. The finance ministry is set to update the income range data by releasing it for assessment years 2013- 14 and 2