@Janet – clearly, the NPG has a burden of cost in maintaining these collections. The question here is whether they (we) can find better, more reactive, more “networked” ways of exposing (or not!) and money-making from those collections. My line always has been – we need *more* information, more tests, more evidence and less ostriching of the challenges that freely-available data brings

@Dan, @Julian – yes, I think the question about invisible value attribution is one that probably won’t (or can’t) be answered. The fact that I know that the Mona Lisa is at the Louvre might be something I learnt from the web at large, or Wikimedia, or Google, or maybe my mum. Who knows, and who – more to the point – can put financial or social value on that knowledge, or source of that knowledge?

@Seb – I’m slightly embarrassed to admit I haven’t read this paper, but will do so now 🙂 Although, yes, I know your angle on this stuff, and it is clearly incredibly valuable to begin to debate, research, test, try and – maybe – fail. And ditto, I think you’re right – this example is likely to be hijacked by the detail rather than the bigger picture…