Facts and myths about research on public policy implementation: Out-of-fashion, allegedly dead, but still very much alive and relevant

Despite several decades of research on public policy implementation we know surprisingly little, not only about cumulative research results, but also about several other key aspects of this research field. This article tries to amend these deficiencies by presenting the results of a comprehensive literature survey. Its main purpose is to challenge, revise, and supplement some conventional wisdom about implementation research. A second motivation is to lay the foundation for and initiate a much needed synthesis of empirical research results. The main results are: The overall volume of publications on policy implementation has not stagnated or declined dramatically since the mid 1980s as is commonly asserted. On the contrary, it has continued to grow exponentially through the 1990s and into the twenty-first century. Even more surprising is that a large number of publications are located outside the core fields. Hence, the literature is substantially larger and more multidisciplinary than most commentators realize. Doctoral dissertations are the most ignored, but probably the richest, largest, and best source of empirical research results. Tracing the origin as well as the location of the disciplinary and geographical cradle of implementation studies must also be readjusted significantly. The ethnocentric bias of this research field toward the Western hemisphere has been, and still is, strong and some policy sectors are given much more attention than others. Although positive in many ways, the predominant multidisciplinary character of implementation research still poses some serious problems with respect to theory development. Thus, I discuss whether a resurgence of interest in policy implementation among policy scholars may already be occurring. Finally, I suggest that the time is long overdue for efforts to synthesize research results in a more rigorous scientific manner than has hitherto been done.