Resumen: In this paper, we formally discuss the Sarewitz-Nelson rules for technological fixes (SN-rules). In their original form, the SN-rules were formulated from an implicit theoretical framework such that they define a broad technology assessment heuristic. This formulation has advantages and disadvantages. In this work, we propose that it is possible to make advances in the interpretation and use of the SN-rules, if we formally consider them as a procedure for technology screening, integrated within a wider process of technology choice and policy-making. This conception helps us to assess the nature and applicability of the SN-rules in different contexts, and allows us to position them as a contribution to the economic theory of technology policy. Idioma: Inglés DOI: 10.1080/10438599.2015.1133042 Año: 2016 Publicado en: Economics of innovation and new technology 25, 7 (2016), 714-730 ISSN: 1043-8599 Factor impacto SCIMAGO: 0.633 - Economics, Econometrics and Finance (miscellaneous) (Q1) - Management of Technology and Innovation (Q2)