When I read several statistical papers, they mention "oracle" property or "oracle" estimator. What do they mean by "oracle"? I understand this oracle is not a company name, but have no idea what this means.
For example, Candes and Tao 2007 is about "oracle" inequality in a context of large dimensional estimation of linear model (p>>n). https://projecteuclid.org/euclid.aos/1201012958)
Zou 2006 discusses "oracle" property of Lasso. (http://www.tandfonline.com/doi/abs/10.1198/016214506000000735)
I am not familiar with this field but I have to read one paper which discusses high dimensional test in statistics.