Barbara McIsaac writes:
The question frequently arises as to when aggregated or anonymized can be disclosed and when even with the aggregation or anonymization it is likely to disclose information that need to be protected. Two recent decisions from the Office of the Information and Privacy Commissioner of Ontario provide some guidance.
In PO-3438 the issue was whether aggregate information about professional allowances paid by drug manufacturers to pharmacies could be released.
Read more on The Law of Privacy in Canada Blog.