Rethinking Courts in Federal Systems: A Comparative Approach

The paper begins by identifying a fundamental epistemological dilemma: how can scholars construct theories that identify and explain common features across all federal systems while also accounting for their distinctive traits and differences? Traditional comparative methods often fall short, either oversimplifying complex systems or failing to generalize beyond isolated case studies.

This problem is particularly acute in the study of courts in federal systems. Much of the existing literature consists of single-country analyses that lack a comparative lens. Empirical methods borrowed from political science promise a methodology that could enable cross-country comparisons to be made, but they tend to treat law as a subset of politics, overlooking the normative and doctrinal substance of judicial reasoning. Building on work by Francesco Palermo and Karl Kössler and several others, my paper argues for a more nuanced approach—one that sees legal doctrine as both shaped by and shaping political realities.

To address these challenges, my paper advocates for a revival of conceptual thinking in comparative constitutional law. Drawing on the work of scholars like Christoph Möllers and Hannah Birkenkötter, it emphasizes the importance of well-constructed explanatory concepts that can both explain and critique constitutional phenomena. These concepts must be capable of capturing the multidimensional and multilayered nature of diverse federal systems, overcoming to the fullest extent possible each researcher’s own idiosyncratic jurisdictional background and personal understanding of such systems.

The key lies in developing frameworks that allow meaningful comparison across federal systems—not just by distinguishing the federal from the non-federal, but also by exploring the diverse ways in which federal constitutions are made, powers are distributed, institutions are composed, and disputes are adjudicated. Standard dichotomies that distinguish different types of federal system (e.g. aggregative vs. devolutionary, symmetrical vs. asymmetrical, coordinate vs. cooperative) are helpful but insufficient. The paper calls for finer distinctions and greater attention to the institutional and procedural nuances that shape federal constitutions, and their interpretation by the courts.

Central to the paper’s framework is the concept of the "singularity-plurality motif". Premised on the observation that all federal systems involve a constitutional combination of a "plurality of polities" within a "singular polity", the paper argues that every federal system exhibits its own unique singularity-plurality motif which describes and explains the dynamic relationship between the singular general polity and the plurality of constituent polities within the federal system. Each federation expresses this motif in unique ways, expressed in its constituent foundations, constitutional structure, institutional composition, and mechanisms of power negotiation, distribution and change.

By analyzing how this motif manifests in different systems, it is proposed that scholars can better understand the underlying logic of federal arrangements. It is argued that this approach allows for both generalization and specificity, offering a way to compare systems generally without flattening their complexity.

Building on this conceptual foundation, the paper presents a taxonomy of federalism disputes commonly adjudicated by courts in federal countries. These disputes fall into five broad categories:

1. Constituent Power – Questions about the establishment and legitimacy of the federal constitution, as well as the constituent state constitutions.
2. Institutional Composition – Disputes over the structure and composition of federal and state institutions, especially the legislature, the executive and the judiciary.
3. Power Distribution – Conflicts regarding the allocation of legislative, executive, and judicial powers between the federal, state and (sometimes) local orders of government.
4. Intergovernmental Relations – Issues involving cooperation, competition, or conflict between the two (or three) orders of government.
5. Constitutional Change – Legal challenges related to constitutional amendment and reform, by both formal and informal means.

This taxonomy provides a structured way to analyze the types of cases courts encounter in federal systems, highlighting the recurring themes and tensions that define federal jurisprudence.

The paper then explores the varieties of interpretive modalities used by courts when resolving federalism disputes. These include textual, structural, historical, purposive, comparative and doctrinal approaches, each with its own strengths and limitations. Courts often rely on archetypical arguments—such as appeals to national unity, democratic legitimacy, regional autonomy or institutional balance—to justify their decisions.

Understanding these modalities is crucial for comparative analysis, as they reveal how different legal cultures prioritize certain values and principles. They also shed light on the rhetorical strategies judges use to navigate complex constitutional terrain.

Recognizing that courts do not operate in a vacuum, the paper then discusses the relationship between law and politics. Building on the work of Gerald Baier, the paper argues that it is possible to avoid both a formalistic approach that overemphasizes the stability of legal meaning within constitutional texts and judicial doctrine and an exaggerated realism that reduces legal reasoning to a mere instrument of personal strategizing, partisan influence and ideological motivation.

The paper then introduces a scale of political salience to assess the political dimensions of federalism cases. Some disputes are highly politicized, involving major national controversies or intergovernmental tensions, while others are more technical or routine. The scale identifies several different types or dimensions of "politics" that can shape and influence judicial decision-making, which it distinguishes into six categories: personal, partisan, ideological, legal, judicial, and constitutional.

It is proposed that this scale helps explain why courts may adopt different reasoning styles or levels of deference depending on the political stakes and the nature of the issues raised by each case. It also underscores the importance of context in judicial decision-making, reminding us that legal reasoning is often intertwined with broader political dynamics of varying kinds, but cannot be reduced to "mere" politics.

In its conclusion, the paper argues for a dialogic, multi-layered approach to comparative federal jurisprudence. This method involves:

• building taxonomies that organize the diversity of federal systems;
• refining concepts to capture both general patterns and specific variations;
• analyzing interpretive modalities to understand judicial reasoning; and
• assessing political salience to contextualize legal decisions.

By integrating these elements, it is proposed that scholars can develop theories that are both explanatory and context-sensitive. The approach seeks to move beyond mere juxtaposition of case studies and towards a more rigorous, comparative understanding of federal jurisprudence.

The stakes of these methodological questions are high. Courts in federal systems play a crucial role in maintaining constitutional order, resolving intergovernmental disputes, and shaping the evolution of federal arrangements. A deeper, more rigorously comparative understanding of their work can illuminate how federations function—and how they might be improved.

Moreover, it is hoped that the paper’s emphasis on conceptual clarity and methodological rigour offers a model for other areas of comparative constitutional law. It argues that legal scholarship can benefit from the tools of the social sciences without losing sight of normative and doctrinal concerns.