Objectives: The objective of this study is to analyze statistically the possible determinants and implications of including or not including recommendations in health technology assessments (HTAs).

Methods: A sample of 433 HTAs published by eleven leading institutions or agencies in nine countries was reviewed and analyzed statistically by multiple logistic regression.

Results: The extent of policy and research recommendations in HTAs varies greatly from country to country. The content and scope of HTAs have some impact on recommendations. Extensive assessment of economic and organizational aspects increases the likelihood of including policy recommendations. Extensive assessment of technological and patient aspects increases the likelihood of including research recommendations, whereas extensive focus on economic aspects is negatively related to research recommendations. The most striking result is that the use of external partners for assessment increases the likelihood of including research recommendations in HTAs but not policy recommendations.

Conclusions: HTA commissioners, agencies, institutions, and funding authorities need to be aware of the consequences of the choices they make in advance of assessing health technologies. Outsourcing HTA to external partners suggests a greater likelihood of being told that “more research is needed.” The scope and content of HTAs has an impact on the type of recommendations, and country-specific preferences are strong predictors of recommendations in HTAs.