# 25. Political / organisational tricks ## 25.5. Methodology/Refinements/Sub-species ## 25.5.2. Logrolling This refers to the practice of trading favours by politicians. Legislation that might not be passed because it favours one group at the expense of another can be passed in exchange for the quid pro quo support on other such legislation by fellow "logrolling" parliamentarians. It happens continuously but only when free-voting is permitted.