The doctrine of ‘best interests of the child’ has guided courts in determining post-divorce child custody cases in Taiwan since 1996 amendments to the Civil Code. Amended Article 1055-1 requires judges to consider factors such as ‘the age, sex, and wishes of the child’ and ‘the age, occupation, character, health condition, economic condition, and lifestyle of the parents.’ However, previous studies have not clarified which factors judges consider primary. This article collects Taiwanese family court decisions from 2012 to 2017, involving 1,126 children whose parents were both Taiwanese and who both sought to acquire custody, in which Taiwanese district courts granted sole custody to the husband or wife. The article employs decision tree methodology, a commonly used machine learning technology. The article concludes that the three most significant factors considered by Taiwanese judges are first, which parent is the child's current primary caregiver, followed by the wishes of the child and the judge's assessment of parent-child interaction. This result runs counter to widely held beliefs that parental gender and parents’ occupations and economic resources are still prime factors in judges’ contemplation. Decision tree learning, we suggest, can assist parents’ and lawyers’ case evaluations and speed up extrajudicial custody determination arrangements.

The legal concept of ‘amicus curiae’ (friend of the court) was unknown in Israeli law until 1999 when, in the course of a well-known legal decision (the Kuzli case), the Israeli Supreme Court adopted this common law concept as part of Israeli law. Almost fifteen years have elapsed since the legal precedent set in Kuzli, during which time the criteria for participation as an amicus curiae have been established.

The aim of this study was to empirically explore and analyse the ways in which the procedural institution of amicus curiae has been used and adopted under Israeli law, and the extent to which it has influenced judicial decisions. The study has used empirical methods, including the collection of quantitative data from computerised databases in Israel concerning cases in which an application to be recognised as an amicus curiae was made.

The main findings indicate that, over the last decade, the number of applications for recognition as an amicus curiae has grown steadily. Most of these applications were made by non-governmental organisations in attempting to support private individuals engaged in legal proceedings against the state or for-profit corporations. The findings reveal that the courts have approved most of these applications.