Peer review: single-blind, double-blind, or all the way-blind?

A scholarly peer review is the process whereby referees scrutinize research work or a manuscript within their field of expertise and decide on its acceptability for publication in a journal or scientific proceeding. Ideally, peer review is impartial. Among the many models of peer review, the single blind is currently the most adopted model in scientific journals. The double-blind model has been claimed to decrease bias, despite some difficulty in implementation.