These days we hear incessantly about “data”. The media is full of reports of new data about this or that, and there’s a new and growing occupation of data analysts and even data scientists. So, what is data, where does it come from, what are people doing with it, and why should I care?

Google “data” and you find it’s “facts and statistics collected together for reference or analysis”. The advent of computers has allowed businesses and governments to record, calculate, play with and store huge amounts of data.

Credit: Matt Davidson

Businesses have data about what goods and services they’re making, buying and selling, importing or exporting, and paying their workers, going back for 30 or 40 years.

Our banks have data about what we earn and what we spend it on, especially when we use a credit or debit card – or our phone – to pay for something.

Much of this data is required to be supplied to government agencies. If you ever go onto the Australia Taxation Office’s website to do your annual tax return, it will offer to “pre-fill” your return with stuff it already knows about your income from wages, bank interest and dividends.

Try it sometime. You’ll be amazed by how much the taxman knows and how accurate his data are.

Another dimension of the “information revolution” is how advances in international telecommunications – including via satellites – have allowed us to be in touch with people and institutions around the world in real-time via email and the web – news, entertainment, social media, whatever.

Last month, the Australian Statistician – aka the boss of the Australian Bureau of Statistics – Dr David Gruen, gave a speech outlining some of the ways these huge banks of “big data” about the economic activities of the nation’s businesses, workers, consumers and governments can be used to improve the way we measure the economy in all its aspects: employment, inflation, gross domestic product and the rest.

We’re getting more information and more accurate information, and we’re getting it much sooner than we used to. But we’re still in the early days of exploiting this opportunity to be better informed about what’s happening in the economy and to have better information to guide the government’s decisions about its policies to improve the economy’s performance.