Over the last 20 years, policy appraisal has emerged as a popular topic for discussion amongst policy-makers and academics alike. Much research effort has been devoted to developing tools and techniques to inform appraisal activities, but there has been, until recently, a distinct paucity of research on what might be termed the ‘policy and politics’ of policy appraisal. This is surprising, since policy appraisal is undoubtedly an important site of political behaviour, with its own institutions, instruments and policy actors. This paper takes stock of recent research on policy appraisal, draws out some common threads, and makes some suggestions for future research on what is a rapidly expanding field of European public policy analysis.

For the integration of environmental concerns into sectoral policies, two approaches can be distinguished: horizontal integration delegates the responsibility mainly to the environmental departments. Vertical integration makes the departments responsible for themselves and can be labeled as "governmental self-regulation". Various instruments have been developed to make integration operational. This article provides a framework for assessing the conditions of use of such instruments. Data on their application in 29 OECD countries is presented. Tools for vertical integration are not widely applied so far although many authors advocate their introduction. Instead, there is still a strong reliance on tools for horizontal integration. Finally, the reasons for such restraint are discussed.

The paper firstly summarizes the approach and findings to evaluate the effectiveness of environmental policies around the globe as it was undertaken in the Sixth Global Environment Outlook (GEO-6; 2019). The data gathered in GEO-6 reveals (1) a high level of institutional innovation, increasingly from the global south, (2) a lack of environmental policy integration (3) spatial and temporal dynamics and (4) the importance of the policy design. Current environmental policies are, however, not sufficient to effectively preserve natural resources and limit emissions to a sustainable level. This has led to a general recognition of the need for a transformative change that goes beyond mere improvements of efficiency. The second part of the paper analyses how environmental policies could contribute in shaping such transformations to sustainability. Transformative policies can be built on social innovations and experimentation with institutional innovation. This is compatible with incremental and sectoral policy making. However, given the complexity and stability of social systems, the outcomes of such policies are uncertain. This is why we argue for strengthening conventional, strategic environmental policies and complementing rather than replacing them with transformative policies.