Data and databases are increasingly central to business activities today , with even relatively small data flows having the potential to create considerable economic value. Despite this, attempts to conceptualise and measure the value of data remain underdeveloped. This paper explores four different perspectives from which the value of data, databases, and data flows can be conceptualised and measured: i) how much businesses spend on storing data; ii) how much money businesses make from selling data-based products; iii) how the market valuation of "data-driven firms" compares to that of other firms; and iv) the value of trade flows in digitally deliverable products.