Predatory Publishing has no agreed upon definition. The publishing industry is constantly shifting and quality between journals varies enough that there is no firm distinction or measurement between predatory, low quality and average journals. Predatory publishers often lack a rigorous peer review system, so articles may be published with little or no formal input from peers. Since a predatory publishers main goal is to make money, distributing and reviewing articles becomes a lower priority. Publishing in a low quality or predatory journal can harm a scholar's reputation, calling their ability to build solid methodology, construct well written papers, and get published with a higher quality journal.
