12 pages., Online via UI electronic subscription, Authors developed a composite index of GMO standard restrictiveness for 60 countries, assigning objective scores to six different regulatory dimensions. Results showed that many of the determinants highlighted in the theoretical literature are important determinants of the restrictiveness of the GMO regulation. Findings emphasized the prominent role of the market for information, "showing that the structure of domestic mass media (public vs. private) is an important driver of GMO standards."