I like a big spreadsheet, and one with over 277,000 rows is particularly special, albeit tricky to navigate. Over the last few weeks there has been a veritable cornucopia of data released by the Australian Taxation Office (ATO), including a range of summary tables about the varied characteristics of taxpayers, such as taxable incomes, how much tax they pay and the distribution of superannuation balances. The ATO also released individual data for two per cent of overall personal income tax returns, appropriately made anonymous by tweaking some data items such as address to a very broad geographic area and averaging...