In 1991, Christopher Hood made a substantial contribution to public administration research when he formulated the concept of New Public Management (NPM). His article can in many ways be understood as an enabler of research focused on public sector reforms. To this day, numerous articles and books have been published, discussing the concept itself and the empirical phenomenon. In celebration of the 25-year period since the concept of NPM was introduced, this article revisits the current knowledge through a systematic literature review of 299 articles published between 1991 and 2016. This approach enables a meta-analysis of research published in five top-ranked international public administration journals. We identify four important themes as emerging from our review: (i) a reform with a vague intention, (ii) the limping concept, (iii) the one-sided perspective and (iv) NPM as the new norm. An important effect of this is that Hood’s framework may have been curtailed, leading to a distorted knowledge base when it comes to future studies.