Microeconomics of Everyone: Institutions and the Human Life Cycle

On the court of economics

Microeconomics deals with the behaviour of individual economic units and one important topic in this respect is the optimal use of limited resources (Pindyck and Rubinfeld, 2009, pp. 26-27). When it comes to limited resources there is one fundamentally relevant for all humans: time. Mainstream economic teaching deals with the use of time especially with respect to the optimal mixture of leisure and labour in order to income-based consumption (Burda and Wyplosz, 2009, p. 107).Also in an strictly economic perspective there may be more than these two alternatives to invest one’s time though — e.g. training and education — and one may question modelling the motivation of human behaviour within such superficial and exclusive framework. Although individual human behaviour for sure follows rational deliberations and adopted objectives, it first of all is motivated also by needs (Heckhausen and Heckhausen, 2010, p. 3).To this effect it is no surprise that according to a traditional definition economic science has to deal with needs or, more precisely, the spectre of activities serving the satisfaction of human needs (Wöhe and Döring, 2008, p. 1). The variety and complexity of human needs finally hints on the actual complexity of human behaviour and why it is guided by explicit and implicit rules. In economics such rules often are called institutions and exemplary try to ban opportunism and establish some predictability (Kasper and Streit, 2005, p. 2). Predictability it is what sometimes is supposed also for the course of human lives. It is this supposition — not any databased fact — this analysis deals with. The solely objective: sketch a model that is able to illustrate how institutions may impose a standardized human life cycle on members of modern societies.

Let’s play theory

First, a psychological framework is chosen whose complexity, as a precaution, does not excel the capability of minds believing in mainstream economic models. An adequate example seems to be given by the ERG theory of Alderfer (1972). It divides human needs in only three classes: existence needs, relatedness needs and growth needs. Existence needs as a classification with regard to economics especially refer to consumption. Relatedness needs refer to social and external esteem while growth needs as a classification refer to internal esteem and self actualization. Some underlying assumptions about the priority and interdependence of these three classifications may be captured in the following principals:

satisfaction-progression-hypotheses (satpro)

  • Satisfaction (sat) of existence needs (e) increases the dominance of relatedness needs (r) by their intensification (int).
  • Satisfaction of relatedness needs increases the dominance of growth needs (g) by their intensification.

frustration-hypotheses (fru)

  • Dissatisfaction (dis) of existence needs let their dominance increase by proportional intensification.
  • Dissatisfaction of relatedness needs let their dominance increase by proportional intensification.
  • Dissatisfaction of growth needs let their dominance increase by proportional intensification.

frustration-regression-hypotheses (frureg)

  • Dissatisfaction of relatedness needs also increases the dominance of existence needs by proportional intensification.
  • Dissatisfaction of growth needs also increases the dominance of relatedness needs by proportional intensification.


For simplicity this analysis does not apply all parts and interpretations of the underlying theory and the adopted ones are also applied in a simplified manner. Furthermore, it adds some assumptions to complete a system dynamics model of human behaviour (see fig. 1):

satisfaction-adaptation-hypotheses (satadap)

  • Needs constantly reappear according to a minimum amount (min) to be satisfied.
  • This minimum adapts in a logistic way to the level of satisfaction experienced.
  • Satisfaction only and directly depends on individual emphasis (emp) and the correspondingly dedicated budget (bud) of effort.
  • Individual emphasis is determined by the maximum of either dissatisfaction ot the minimum appearance anticipated by habit or some institutional necessity – like university (uni), a full-time job (job) or family (fam).


The institutions selected to mention rather occur sequential in human life cycle and probably demand to emphasize different classification of needs. In favour of an illustrative result it is assumed:

  • Studying at the university only implies that a large part of effort is dedicated to the satisfaction of growth needs.
  • After some years of studying the first full-time job is assumed to occur and require an even bigger part of daily time dedicated to the satisfaction of existential needs solely.
  • After some years within relatedness needs dominate a decision in favour of a family follows and from now on dedicates a given amount of effort to the satisfaction of relatedness needs.

Building a whole model on nothing but assumptions seems questionable, even more when there is not any underlying data applied for the hypothetical coefficients, the starting values for several state variables or the timing and extent of institutional limitations applied. Any ‘exemplary’ setting (see app. A) seem equally ‘arbitrary’. Every similarity between generated result and reality exists only by chance. The difference between ‘calibration’ and ‘manipulation’ vanishes. What stays, though, is the fun, playing at the buttons in order to illustrate a scenario for the aspired dramatic screenplay (see fig. 2):

  • University at first may imply an engorgement with regard to growth needs, while the rising concious about satisfied existence needs triggers relatedness needs.
  • The increased satisfaction of growth needs let the minimum appearance increase too, which causes trouble when the full-time job does not allow for full satisfaction of growth needs anymore.
  • While the minimum appearance of existence needs adapts towards the imposed satisfaction, the tensed situation leads to even more dissatisfaction of relatedness needs.
  • The thereby provoked decision in favour of a family in turn distorts the dominance of needs again implying once more a dissatisfaction of growth needs.
  • This in turn intensifies relatedness needs again and let their dissatisfaction increase to a long-term extent although family still imposes corresponding effort.


Barefaced interpretation

Within this screenplay institutions force people to emphasize the satisfaction of needs partly in contrast to their felt intensification. This leads to a rather abrupt distortion — engorgement of some needs simultaneous to the dissatisfaction of others. Quarter- and mid-life crises as well as enduring unmet relatedness needs occur as part of the human life cycle.

Why? Because the model says so. Why? Because some people think so. Why? Because to some extent it seems plausible and we maybe should discuss about restrictions we face, when we try to allocate our time — a resource perceived scarcer every year of our life using it path depended and partly far from economic optimality. So maybe the model explains nothing but the idea that we should try to explain ourselves a bit more. Even then do not underestimate this insight.


Appendix A: setting

  • coefficients: fru=0.3, frureg=0.05, satpro=0.05, satadap=0.1
  • starting vlaues: sat =min = int = emp for e =4, r=3, g=6
  • institutional restrictions: uni=8,  job=8, fam=3 of bud=16


  • Alderfer, Clayton (1972). Existence, Relatedness, and Growth: Human Needs in Organizational Settings. New York: Free Press.
  • Burda, Michael and Charles Wyplosz (2009). Macroeconomics: A European Text. 5th ed. Oxford: University Press.
  • Heckhausen, Jutta and Heinz Heckhausen (2010). Motivation und Handeln. 4th ed. Berlin: Springer.
  • Kasper, Wolfgang and Manfred E. Streit (2005). Institutional Economics: Social Order and Public Policy. Reprint. Cheltenham: Edward Elgar.
  • Pindyck, Robert and Daniel Rubinfeld (2009). Mikrookonomie. 7th ed. Munchen: Pearson Studium.
  • Wohe, Gunter and Ulrich Doring (2008). Einfuhrung in die Allgemeine Betriebswirtschaftslehre. 23rd ed. Munchen: Valen.

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