In 2014, it instructed 41 government agencies to work on gender mainstreaming from 2015 to 2018 in a concerted effort called the “Gender Mainstreaming in Government Agencies Programme”. If they are to take hold across government, though, and deliver concrete outcomes, they will need resources. There are several tools that Mexico is gradually developing to improve implementation: gender impact assessments and gender-responsive budgeting, as well as the systematic development and use of gender-disaggregated data throughout the policy cycle. To offset any such negative consequences and make smart use of resources, gender impact assessments (GIA) can be a first line of defence. It is one of the core tools at a governments’ disposal to support the implementation of gender mainstreaming- sometimes referred to as gender-based analysis or a gender audit- and regularly used by most OECD member countries (Table 6.1).