Encyclopedia of Law and Economics

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Institutional Complementarity

  • Fabio LandiniEmail author
  • Ugo Pagano
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-7883-6_196-1


Institutional complementarity refers to situation of interdependence among institutions. The present article presents a formal representation of institutional complementarity and discusses several economic applications of this concept.


Corporate Governance Intellectual Property Institutional Environment Institutional Arrangement Human Capital Investment 
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Even if several definitions have been proposed in the literature (Crouch et al. 2005) they share the idea that institutional complementarity refers to situations of interdependence among institutions. Institutional complementarity is frequently used to explain the degree of institutional diversity that can be observed across and within socioeconomic system and its consequences on economic performance. In particular, the concept of institutional complementarity has been used to illustrate why institutions are resistant to change and why introducing new institutions into a system often leads to unintended, sometimes suboptimal, consequences.

Institutional Complementarity

The canonical formal representation of the concept of institutional complementarity is due to Aoki (2001) and relies on the theory of supermodular games developed by Milgrom and Roberts (1990). The basic structure of the model takes the following form.

Let us consider a setting with two institutional domains, A and B, and two sets of agents, C and D that do not directly interact with each other. Nevertheless, an institution implemented in one domain parametrically affects the consequences of the actions taken in the other domain. For instance, A can be associated with the type of ownership structure prevailing in a given country and B with the structure of labor rights. For simplicity, we assume that the technological and natural environment is constant.

Suppose that the agents in domain A can choose a rule from two alternative options: A 1 and A 2; similarly, agents in domain B can choose a rule from either B 1 or B 2. For simplicity, let us assume that all agents in each domain have an identical payoff function u i  = u(i ∈ C) or v j  = v(j ∈ D) defined on binary choice sets of their own, either {A 1; A 2} or {B 1; B 2}, with another sets as the set of parameters. We say that an (endogenous) “rule” is institutionalized in a domain when it is implemented as an equilibrium choice of agents in the relevant domains.

Suppose that the following conditions hold:
$$ u\left({A}^1;{B}^1\right)\ \hbox{--} u\left({A}^2;{B}^1\right)\ \ge u\left({A}^1;{B}^2\right)\ \hbox{--} u\left({A}^2;{B}^2\right) $$
$$ v\left({B}^2;{A}^2\right)\ \hbox{--} v\left({B}^1;{A}^2\right)\ \ge v\left({B}^2;{A}^1\right)\ \hbox{--} v\left({B}^1;{A}^1\right) $$
for all i and j. The latter are the so-called supermodular (complementarity) conditions. Equation 1 implies that the “incremental” benefit for the agents in A from choosing A 1 rather than A 2 increases as their institutional environment in B is B 1 rather than B 2. Equation 2 implies that the “incremental” benefit for agents in B from choosing B 2 rather than B 1 increases if their institutional environment in A is A 2 rather than A 1. Note that these conditions are concerned with the property of incremental payoffs with respect to a change in a parameter value. They do not exclude the possibility that the level of payoff of one rule is strictly higher than that of the other for the agents of one or both domain(s) regardless of the choice of rule in the other domain. In such a case the preferred rule(s) will be implemented autonomously in the relevant domain, while the agents in the other domain will choose the rule that maximizes their payoffs in response to their institutional environment. Then the equilibrium of the system comprised of A and B – and thus the institutional arrangement across them – is uniquely determined by preference (technology).

However, there can also be cases in which neither rule dominates the other in either domain in the sense described above. If so, the agents in both domains need to take into account which rule is institutionalized in the other domain. Under the supermodularity condition, there can then be two pure Nash equilibria (institutional arrangements) for the system comprised of A and B, namely, (A 1; B 1) and (A 2; B 2). When such multiple equilibria exist, we say that A 1 and B 1, as well as A 2 and B 2, are “institutional complements.”

If institutional complementarity exists, each institutional arrangement characterizes as a self-sustaining equilibrium where no agent has an inventive to deviate. In terms of welfare, it may be the case that possible overall institutional arrangements are not mutually Pareto comparable or that one of them could be even Pareto suboptimal to the other. In these cases, history is the main force determining which type of institutional arrangements is likely to emerge, with the consequence that suboptimal outcomes are possible.

Suppose, for instance, that (A 2; B 2) is a Pareto-superior institutional arrangement in which u(A 2; B 2) > u(A 1; B 1) and v(B 2; A 2) > v(B 1; A 1). However, for some historical reason A 1 is chosen in domain A and becomes an institutional environment for domain B. Faced with this institutional environment, agents in domain B will correspondingly react by choosing B 1. Thus the Pareto-suboptimal institutional arrangement (A 1; B 1) will result. This is an instance of coordination failure in the presence of indivisibility.

Obviously, there can also be cases where u(A 2; B 2) > u(A 1; B 1) but v(B 1; A 1) > v(B 2; A 2). This is an instance where the two viable institutional arrangements cannot be Pareto ranked. Agents exhibit conflicting interests in the two equilibria, and the emergence of one institutional arrangement as opposed to the other may depend on the distribution of decisional power. If for some reasons agents choosing in domain A have the power to select and enforce their preferred rule, arrangement (A 2; B 2) is the most likely outcome. Alternatively, agents choosing in domain B will force the society to adopt (B 1; A 1).

Pagano (1992) and Pagano and Rowthorn (1994) are two of the earliest analytical contributions to institutional complementarity. In their models, the technological choices take as parameters property rights arrangements whereas the latter are made on the basis of given technologies. The complementarities of technologies and property rights create two different sets of organizational equilibria. For instance, strong rights of the capital owners and a technology with a high intensity of specific and difficult to monitor capital are likely be institutional complements and define one possible organizational equilibrium. However, also strong workers’ rights and a technology characterized by a high intensity of highly specific labor can be institutional complements and define an alternative organizational equilibrium. The organizational equilibria approach integrates the approaches à la Williamson (1985), which have pointed out the influence of technology on rights and safeguards, and the views of the radical economists (see, for instance, Braverman 1974), who have stressed the opposite direction of causation. The complementarities existing in the different organizational equilibria integrate both directions of causation in a single analytical framework. A similar approach has been used to explain organizational diversity in knowledge-intensive industries, such as software (Landini 2012, 2013).

Institutional complementarities characterize also the relations between intellectual property and human capital investments. Firms owning much intellectual property enjoy a protection for their investments in human capital, which in turn favor the acquisition of additional intellectual property. By contrast other firms may find themselves in a vicious circle where the lack of intellectual property inhibits the incentive to invest in human capital and low levels of human capital investments involve that little or no intellectual property is ever acquired (Pagano and Rossi 2004).

Less formal approaches to institutional complementarities have also been adopted. In their seminal contribution, Hall and Soskice (2001) develop a broad theoretical framework to study the institutional complementarities that characterize different varieties of capitalism. Having a specific focus on the institutions of the political economy, the authors develop an actor-centered approach for understanding the institutional similarities and differences among the developed economies. The varieties of capitalism approach has inspired a large number of applications to the political economy field. To give some examples, Franzese (2001) and Höpner (2005) investigate the implications for industrial relations; Estevez-Abe et al. (2001) use the approach to analyze social protection; Fioretos (2001) considers political relationships, international negotiations, and national interests; Hall and Gingerich (2009) study the relationship among labor relations, corporate governance, and rates of growth; Amable (2000) analyzes the implications of institutional complementarity for social systems of innovation and production.

In addition to institutional variety, the notion of institutional complementarity has also motivated studies on institutional change (Hall and Thelen 2009; Boyer 2005). In these works institutional complementarity is often presented as a conservative factor, which increases the stability of the institutional equilibrium (Pagano 2011). In the presence of institutional complementarity change requires the simultaneous variation of different institutional domains, which in turn demands high coordination among the actors involved. Sometime, institutions themselves can act as resources for new courses of action that (incrementally) favor change (Deeg and Jackson 2007).

Alongside contributions on the distinct models of capitalism, the concept institutional complementarity has found application also in other domain of analysis. Aoki (1994), for instance, studies the role of institutional complementarity in contingent governance models of teams. Siems and Deakin (2010) rely on an institutional complementarity approach to investigate differences in the business laws governing in various countries. Gagliardi (2009) argue in favor of an institutional complementarity relationship between local banking institutions and cooperative firms in Italy. Bonaccorsi and Thuma (2007), finally, use the idea of institutional complementarity to investigate inventive performance in nano science and technology.


  1. Amable B (2000) Institutional complementarity and diversity of social systems of innovation and production. Rev Int Polit Econ 7(4):645–687CrossRefGoogle Scholar
  2. Aoki M (1994) The contingent governance of teams: analysis of institutional complementarity. Int Econ Rev 35(3):657–676CrossRefGoogle Scholar
  3. Aoki M (2001) Toward a comparative institutional analysis. MIT Press, CambridgeGoogle Scholar
  4. Bonaccorsi A, Thoma G (2007) Institutional complementarity and inventive performance in nano science and technology. Res Policy 36(6):813–831CrossRefGoogle Scholar
  5. Boyer R (2005) Coherence, diversity, and the evolution of capitalisms: the institutional complementarity hypothesis. Evol Inst Econ Rev 2(1):43–80CrossRefGoogle Scholar
  6. Braverman H (1974) Labor and monopoly capital: the degradation of work in the twentieth century. Monthly Review Press, New YorkGoogle Scholar
  7. Crouch C, Streek W, Boyer R, Amable B, Hall P, Jackson G (2005) Dialogue on “Institutional complementarity and political economy”. Soc Econ Rev 3:359–382CrossRefGoogle Scholar
  8. Deeg R, Jackson G (2007) Towards a more dynamic theory of capitalist variety. Soc Econ Rev 5(1):149–179CrossRefGoogle Scholar
  9. Estevez-Abe M, Iversen T, Soskice D (2001) Social protection and the formation of skills: a reinterpretation of the welfare state. In: Hall PA, Soskice D (eds) Varieties of capitalism: the institutional foundations of comparative advantage. Oxford University Press, New York, pp 145–183CrossRefGoogle Scholar
  10. Fioretos O (2001) The domestic sources of multilateral preferences: varieties of capitalism in the European Community. In: Hall PA, Soskice D (eds) Varieties of capitalism: the institutional foundations of comparative advantage. Oxford University Press, New York, pp 213–244CrossRefGoogle Scholar
  11. Franzese RJ (2001) Institutional and sectoral interactions in monetary policy and wage/price-bargaining. In: Hall PA, Soskice D (eds) Varieties of capitalism: the institutional foundations of comparative advantage. Oxford University Press, New York, pp 104–144CrossRefGoogle Scholar
  12. Gagliardi F (2009) Financial development and the growth of cooperative firms. Small Bus Econ 32(4):439–464CrossRefGoogle Scholar
  13. Hall PA, Gingerich DW (2009) Varieties of capitalism and institutional complementarities in the political economy: an empirical analysis. Br J Polit Sci 39(3):449–482CrossRefGoogle Scholar
  14. Hall PA, Soskice D (2001) Varieties of capitalism: the institutional foundations of comparative advantage. Oxford University Press, New YorkCrossRefGoogle Scholar
  15. Hall PA, Thelen K (2009) Institutional change in varieties of capitalism. Soc Econ Rev 7(1):7–34CrossRefGoogle Scholar
  16. Höpner M (2005) What connects industrial relations and corporate governance? Explaining institutional complementarity. Soc Econ Rev 3(1):331–358CrossRefGoogle Scholar
  17. Landini F (2012) Technology, property rights and organizational diversity in the software industry. Struct Chang Econ Dyn 23(2):137–150CrossRefGoogle Scholar
  18. Landini F (2013) Institutional change and information production. J Inst Econ 9(3):257–284Google Scholar
  19. Milgrom P, Roberts J (1990) Rationalizability, learning and equilibrium in games with strategic complementarities. Econometrica 58(6):1255–1277CrossRefGoogle Scholar
  20. Pagano U (1992) Organizational equilibria and production efficiency. Metroeconomica 43:227–246CrossRefGoogle Scholar
  21. Pagano U (2011) Interlocking complementarities and institutional change. J Inst Econ 7(3):373–392Google Scholar
  22. Pagano U, Rossi MA (2004) Incomplete contracts, intellectual property and institutional complementarities. Eur J Law Econ 18(1):55–67CrossRefGoogle Scholar
  23. Pagano U, Rowthorn R (1994) Ownership, technology and institutional stability. Struct Chang Econ Dyn 5(2):221–242CrossRefGoogle Scholar
  24. Siems M, Deakin S (2010) Comparative law and finance: past, present, and future research. J Inst Theor Econ 166(1):120–140CrossRefGoogle Scholar
  25. Williamson OE (1985) The economic institutions of capitalism. The Free Press, New YorkGoogle Scholar

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© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.LUISS UniversityRomeItaly
  2. 2.University of SienaSienaItaly
  3. 3.Central European UniversityBudapestHungary