Ah , my mistake I didn ' t realize I was replying to someone in another country I ' m in the US . Interesting if that ' s only an overseas thing . <| sep |> I want to see studies that test the hypothesis that more granular data is better than summarized data . Better in what way ? All else being equal , the statistics perspective is that it ' s better to have more observations than fewer , and it ' s better to work with raw data than summaries . If you want to get beyond these truisms and pose a worthwhile problem , then you need to nail down some specifics . I want the approach to be proved . You haven ' t articulated an actual approach , so a lit review isn ' t going to tell you anything that you couldn ' t have figured out with common sense . If you ' re willing to propose a specific modeling problem and a parametrized data generating mechanism , then you could do simulation stuff , and in some cases you might be able to find analytic solutions i . e . proofs . Or you could do some exploration with a preexisting data set . Regardless , this isn ' t a deep theoretical problem in the general case , and for specific applied situations , it ' s more of a nuisance issue .