Efficiency in the provision of pure public goods by private citizens

This paper raises an old question and proposes a new answer. The question is, “Must public goods be produced by governments?” The consensus answer is “Yes,” on the grounds that transaction costs related to group size prevent all potential consumers of a public good from entering into voluntary arrangements to produce efficient levels of that good. Government intervention thus is required to achieve efficiency. Yet many obvious examples of public goods are not financed or even subsidized by government. Conspicuous examples of this phenomenon include the development of important innovations in technique in fields such as music (Bach and Beethoven), literature (Defoe, Dickens and Shakespeare, not excepting Homer or Adam Smith), and the visual arts (Cezanne), not to mention many crucial scientific discoveries. Indeed, the obvious public-good aspects of scientific knowledge induced many private societies to offer prizes for particular innovations. Two questions are raised by the private, voluntary provision of nonrival outputs or inputs: (1) what conditions contribute to this phenomenon, and (2) can voluntary provision come “close” to efficient provision? We suggest in this paper that, under certain conditions, the gains from many public goods whose benefits reach nationwide populations are largely realized at group sizes far smaller than even county or municipal jurisdictions.     

Voluntary purchase of public goods

This paper examines the application of Buchanan's ‘independent adjustment’ model of public good provision to individual donations to voluntary or non-profit organizations. An individual's donation function is a simple transformation of the Marshallian demand function; consequently donation functions ‘reveal,’ in principle, preferences for public goods. The existence of a tax-subsidy system sustaining a Pareto optimal level of provision is demonstrated, and the relationship to the existing subsidy scheme in the U.S. is examined. Finally, two implications of the model suggest that it is not appropriate as a representation of actual donor behavior.     

A general model of rent seeking for public goods

This paper generalizes the model of collective rent-seeking over a public good. Expanding the rent seeker's consumption bundle to include preferences over the public good and a private good, our results suggest collective rent-seeking is positively related to group size. Although free riding exists within a group, there is not a one-for-one tradeoff. In addition, rent seeking increases with wealth. Finally, total effort expended by both groups increases if either group increases in membership size, except in the case of an extremely lopsided contest. The key condition underlying these results is that the marginal utility of the public good is not inversely related to the private good.     

Free-rider effects in rent-seeking groups competing for public goods

This paper studies individual behavior within a group when there is rent-seeking and groups compete in the selection of a public good — a variant of the traditional public goods problem. The situation is different from traditional public goods because an individual may not receive no reward for contribution to the group if the group does not win. Based on theory, the optimal contribution varies strategically depending on the characteristics of the situation, individual risk preferences, income, and subjective probability of winning. Individual contributions or bids toward a group objective were tested experimentally. Results showed that use of a demand revealing mechanism did not produce a significant difference in individual contributions to group efforts when the level of reward was low and when rewards were indirect. However, the demand revealing mechanism caused a significant difference in bids when rewards were high and direct, thus indicating free-riding behavior.     

Private provision of public goods can be efficient

Economists have long believed that private provision of public goods will be inefficient, though recently some have argued that altruism may mitigate the inefficiencies. Without altruism, agents contribute to the point where marginal cost equals their private marginal benefits. With altruism, they contribute more and hence are closer to the point where marginal cost and total marginal benefits are equated. In an earlier paper (Bagnoli and Lipman, 1989), we showed that private provision need not be inefficient. In a very natural model of private provision without altruism, we showed that the set of (undominated perfect) equilibrium outcomes is identical to the core. Here we consider the effect of altruism on private provision. Altruism essentially creates more public goods because the well-being of others becomes a public good. We show that our model of private provision still has efficient equilibria under a wide variety of circumstances. Interestingly, the equilibria may be inefficient when agents are concerned about the effect of private provision on the distribution of wealth. Intuitively, the game we consider is a very powerful instrument for efficient private provision, but must be supported by other instruments if the set of public goods is expanded too far.We wish to thank Jim Andreoni, Ted Bergstrom, and an anonymous referee for helpful comments and to acknowledge financial support from the National Science Foundation through NSF Grant SES-8520296. Of course, any remaining errors are our responsibility.     

Government subsidies to private spending on public goods

This paper examines how the size of an efficient subsidy varies with the amount of free-riding and the presence of distorting taxation. Ironically, the existence of free-riding, where some individuals make no voluntary contribution at all, reduces the size of an efficient subsidy and makes a subsidy more attractive compared to direct taxation. For the gain to be significant, the number of donors must be extremely few in number. Even when the gains from a subsidy relative to direct taxation are small, a subsidy may dominate direct taxation because it can reveal an efficient level of the public good. The analysis distinguishes between traditional public goods such as national defense, and what I call transfer public goods, where members of society care about the consumption of a particular group in society such as the poor. I generalize the Samuelson (1954) results to derive conditions for efficiency in providing transfer public goods.     

Revealed preferences for public goods: Applying a model of voter behavior

Most analyses of preferences for government-supplied goods disregard the fact that in a democratic society, these preferences are revealed by an individual choice: the vote. In this paper this is taken account of in a model, explaining the dynamics in voting behavior in a multi-party system. The model assumes that voters may be categorized into K groups of individuals, pursuing the same interests, who remember how parties do in representing these interests (given the level to which they are held responsible for government policy). The model allows one to estimate party identification, sensitiveness to economic performances, time preference, and relative preferences for public versus private goods, all for each of the groups. Furthermore, the model allows for an estimation of the level to which various parties are held responsible for government policies.An empirical application of the model to the Netherlands is presented, albeit that data restrictions did not allow a distinction of more than one group. The results in terms of significance of the coefficients as well as the interpretation of the original parameters are promising. The two main conclusions are that the relative preference for private versus collective consumption is lower than the existing ratio in the Netherlands, and that two parties forming a government coalition are not held equally responsible for the policies.     

Heterogenous demand for public goods: Behavior in the voluntary contributions mechanism

Numerous laboratory experiments have investigated the performance of several processes for providing public goods through voluntary contributions. This research has been able to identify features of the institution or environment which are reliably likely to produce outcomes “close” to the free riding outcome or “substantially” greater than the pessimistic prediction of standard models. One such feature is the “marginal per-capita return” (MPCR) from the public good. Various authors have altered MPCR between groups or for an entire group at the same time. The experiments reported here address a different question, “What would happen if, within a group, some persons faced a ‘high’ MPCR while others faced a ‘low’ MPCR?”