In recent years, scholars have begun to use social science tools to analyze court opinions. These
scholars have justifiably criticized traditional legal research for its focus on a few cases chosen for
their perceived doctrinal importance, arguing that such research may distort our understanding
of the law. Social scientists endeavor to study court opinions systematically, analyzing samples
of cases that are selected randomly or that constitute the entire universe of cases within certain
bounds. However, social science approaches themselves have limitations. By focusing primarily
on the influence of factors such as the identity of the judge or the ideological orientation of
the court, social scientists may overlook the influence of legal doctrine itself. Their research
designs, which usually involve analyzing the quantitative relationship between characteristics
of cases and their outcomes, are good at detecting the influence of factors that can be easily
quantified but not as good at assessing the influence of factors such as the reasoning of the
judge. Social science approaches have also been criticized for ignoring the distinction between
the holding of a case (the part of the opinion that is legally binding) and the dicta (nonbinding
statements). Finally, these approaches are better suited to analyzing the decisions of appellate
courts, which generally issue written opinions, than the decisions of trial courts, which often
do not.