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Social science perspectives

While institutions tend to appear to people in society as part of the natural, unchanging landscape of their lives, the study of institutions by the social sciences tends to reveal the nature of institutions as social constructions, artifacts of a particular time, culture and society, produced by collective human choice, though not directly by individual intention. Sociology traditionally analyzed social institutions in terms of interlocking social roles and expectations. Social institutions created and were composed of groups of roles, or expected behaviors. The social function of the institution was executed by the fulfillment of roles. Basic biological requirements, for reproduction and care of the young, are served by the institutions of marriage and family, for example, by creating, elaborating and prescribing the behaviors expected for husband/father, wife/mother, child, etc.

The relationship of the institutions to human nature is a foundational question for the social sciences. Institutions can be seen as "naturally" arising from, and conforming to, human nature—a fundamentally conservative view—or institutions can be seen as artificial, almost accidental, and in need of architectural redesign, informed by expert social analysis, to better serve human needs—a fundamentally progressive view. Adam Smith anchored his economics in the supposed human "propensity to truck, barter and exchange". Modern feminists have criticized traditional marriage and other institutions as element of an oppressive and obsolete patriarchy. The Marxist view—which sees human nature as historically 'evolving' towards voluntary social cooperation, shared by some anarchists —is that supra-individual institutions such as the market and the state are incompatible with the individual liberty of a truly free society.

Economic s, in recent years, has used game theory to study institutions from two perspectives. Firstly, how do institutions survive and evolve? In this perspective, institutions arise from Nash equilibria of games. For example, whenever people pass each other in a corridor or thoroughfare, there is a need for customs, which avoid collisions. Such a custom might call for each party to keep to their own right (or left—such a choice is arbitrary, it is only necessary that the choice be uniform and consistent). Such customs may be supposed to be the origin of rules, such as the rule, adopted in many countries, which requires driving automobiles on the right side of the road.

Secondly, how do institutions affect behaviour? In this perspective, the focus is on behaviour arising from a given set of institutional rules. In these models, institutions determine the rules (i.e. strategy sets and utility functions) of games, rather than arise as equilibria out of games. Douglass North argues, the very emergence of an institution reflects behavioral adaptations through his application of increasing returns. Over time institutions develop rules that incentivize certain behaviors over others because they present less risk or induce lower cost, and establish path dependent outcomes. For example, the Cournot duopoly model is based on an institution involving an auctioneer who sells all goods at the market-clearing price. While it is always possible to analyze behaviour with the institutions-as-equilibria approach instead, it is much more complicated.

In political science, the effect of institutions on behavior has also been considered from a meme perspective, like game theory borrowed from biology. A "memetic institutionalism" has been proposed, suggesting that institutions provide selection environments for political action, whereby differentiated retention arises and thereby a Darwinian evolution of institutions over time. Public choice theory, another branch of economics with a close relationship to political science, considers how government policy choices are made, and seeks to determine what the policy outputs are likely to be, given a particular political decision-making process and context. Credibility thesis purports that institutions emerge from intentional institution-building but never in the originally intended form. Instead, institutional development is endogenous and spontaneously ordered and institutional persistence can be explained by their credibility, which is provided by the function that particular institutions serve.

Political scientists have traditionally studied the causes and consequences of formal institutional design. For instance, Douglass North investigated the impact of institutions on economic development in various countries, concluding that institutions in prosperous countries like the United States induced a net increase in productivity, whereas institutions in Third World countries caused a net decrease. Scholars of this period assumed that "parchment institutions" that were codified as law would largely guide the behavior of individuals as intended.

On the other hand, recent scholars began to study the importance of institutional strength, which Steven Levitsky and María Victoria Murillo define in terms of the level of enforcement and sustainability of an institution. Weak institutions with low enforcement or low sustainability led to the deterioration of democratic institutions in Madagascar and the erosion of economic structures in China. Another area of interest for modern scholars is de facto (informal) institutions as opposed to de jure (formal) institutions in observing cross-country differences. For instance, Lars Feld and Stefan Voigt found that real GDP growth per capita is positively correlated with de facto, not de juri, institutions that are judicially independent. Scholars have also focused on the interaction between formal and informal institutions as well as how informal institutions may create incentives to comply with otherwise weak formal institutions. This departure from the traditional understanding of institutions reflects the scholarly recognition that a different framework of institutional analysis is necessary for studying developing economies and democracies compared to developed countries.

In history, a distinction between eras or periods, implies a major and fundamental change in the system of institutions governing a society. Political and military events are judged to be of historical significance to the extent that they are associated with changes in institutions. In European history, particular significance is attached to the long transition from the feudal institutions of the Middle Ages to the modern institutions, which govern contemporary life.