Martin Kolmar

Inefficient Group Organization as Optimal Adaption to Dominant Environments

Contests between groups are plagued by intra-group externalities (freeriding). Yet, costless incentive schemes that entirely avoid free-riding within a group might not be desirable, neither individually nor socially. In contests among two groups, a relatively weak (i.e., small or unproductive) group will optimally not implement them because they compound strength differences between groups. If both groups rein in their intra-group externalities, they are both worse off, compared to a situation with free-riding, if they are relatively similar. If they are sufficiently heterogenous, the weak group loses at the expense of the relatively strong group.

Are national pension systems efficient if labor is (im)perfectly mobile

Abstract In this paper we analyze the effects of labor-market integration on national, unfunded public-pension systems that are organized according to a ‘place of residence’ principle. With this principle, labor might migrate for purely fiscal reasons. Thus, some kind of coordination becomes necessary. We first show that for the case of unrestricted labor mobility the equalization of contributions is necessary and sufficient for efficiency if the pension systems remain decentralized. However, national decision makers do not in general have an incentive to voluntarily stick to equalized contributions. With a segmented labor market where one segment is costlessly mobile whereas the other segment is completely immobile, the coordination requirements are far more complicated if migration cannot compensate for differences in national fertilities. If it can, the efficiency of equalization turns out to be robust. Finally we show that replacing the principle of residence with the ‘principle of nationality’ does not eliminate the risk of fiscal externalities.

Residence-Based Capital Taxation in a Small Open Economy: Why Information is Voluntarily Exchanged and Why it is Not

The issue of capital tax competition is viewed to be unproblematic if residence-based capital-taxation exists. However, the sustainability of residence-based capital taxation depends on the exchange of information about foreign financial investments between tax authorities. This paper analyzes the incentives of tax authorities to voluntarily provide information. We show that voluntary information exchange is an equilibrium in a standard small-country model of tax competition, whereas it may not be an equilibrium when the size of the financial sector has a positive impact on the wage structure of an economy.

Contests and the Private Production of Public Goods

The private provision of public goods generally suffers from two types of efficiency failures: sorting problems (the wrong individuals contribute) and quantity problems (an inefficient amount is provided). Embedding the provision game into a contest that rewards larger contributions with higher probabilities of winning a prize may remedy such failures. Applications include tenure decisions at universities, electoral competition among politicians, etc. We identify a tradeoff between the value of the prize and the decisiveness of the contest. High-powered incentives in contests may cause an overprovision of the public good or wasteful participation of unproductive individuals in the contest.

Poverty, taxation and governance

Abstract In a simple model based on political support approach, we show that poor and less egalitarian societies may impose a lower tax rate contrary to the prediction of the median voter approach. This is consistent with the available empirical findings. In the framework developed in this paper, the government can strategically design a weak governance system to promote informal activities for the poor. This constitutes an alternative redistributive strategy other than the standard tax-transfer policy. The government chooses the tax rate and the degree of governance simultaneously to maximize the average income of the poor in the informal sector of the economy, i.e. those who constitute the majority and help in winning the election.

Anarchy, Efficiency, And Redistribution

The purpose of this paper is twofold. We first develop a contractarian theory of redistribution. The existence of rules of redistribution is explained without any recourse to the risk-aversion of individuals. Hence, we depart from the standard legitimization of redistribution as fundamental insurance and interpret it as stemming from a principle of reciprocity in trade. The second purpose of the paper is to develop a theory of institutions that implement optimal allocations. We depart from the assumption of an exogenous enforcement of constitutional rules. Hence, the self-enforcement of constitutional rules is crucial for the implementability of allocations. This approach implies that there is no allocative difference between constitutional and ordinary rules. What makes constitutions different from ordinary rules is their potential ability to create a focal point that conditions the expectations of individuals on a certain equilibrium strategy. Hence, constitutions help to solve coordination problems, not cooperation problems.

The State's Enforcement Monopoly and the Private Protection of Property

The modern state has monopolized the legitimate use of force. This concept is twofold. First, the state is empowered with enforcement rights; second, the rights of the individuals are restricted. In a simple model of property rights with appropriation and defense activity, we show that a restriction of private enforcement is beneficial for the property owner, even if there are no economies of scale from public protection. We emphasize the role of the state as a commitment device for a certain level of enforcement. However, commitment will only work if the state can regulate private protection, such as private armies and mercenaries.

An Analysis of Institutional Change in the European Union

Institutional change is guided by rules. In the European Union these rules are given by Art. 250–252 of the Treaty of Amsterdam. We analyze these articles as games in extensive form and characterize and compare the equilibria of these games. The analysis identifies the decisive actors and the conditions under which it comes to institutional changes in the European Union. In addition we analyze the tendencies for centralization inherent in these decision procedures as well as their ability to guarantee conflict-minimizing compromises between the institutional actors. We show that the historical evolution from Art. 250 over Art. 252 to Art. 251 implies an improved position of the European Parliament. Contrary to part of the literature we show that the move from Art. 250 to Art. 252 may have important consequences for the policies to be implemented and that the move from Art. 252 to Art. 251 improved the position of the European Parliament. Hence, our model is able to resolve the empirical anomalies resulting in conditional-agenda setting model by Tsebelis and therefore points to the importance of the sequential structure of the decision procedures.

(In)efficient public-goods provision through contests

We ask if awarding multiple prizes in a contest can be used to provide efficient incentives for the production of a public good with heterogeneous producers. With two types of individuals, efficiency can only be guaranteed if the following conditions are met: (i) the contest designer can use at least two prize spreads, (ii) there is a sufficient number of individuals of each type, (iii) low-productivity types don’t have much stronger preferences for the public good and (iv) the contest designer can enforce non-monotonic prize schemes. Our findings show that the challenges from heterogeneity can be overcome by an adequate choice of prizes under the above conditions, but that heterogeneity can also severely limit the usefulness of relative-performance measures.

Efficiency Properties of Labor Taxation in a Spatial Model of Restricted Labor Mobility

We examine the efficiency properties of labor taxation. A spatial model of an economy is introduced whose key feature is a new approach to restricted labor mobility. We characterize the efficient allocation of labor and properties of a decentralized equilibrium. An efficient allocation of labor can be compatible with marginal productivity differentials stemming from binding mobility restrictions. We investigate two scenarios of labor taxation (firm-specific taxes and country-specific taxes) and in both setups we give a complete characterization of the cases for which there is scope for redistribution without affecting efficiency. Finally, we discuss the applicability of our model in the context of the place of employment and place of residence principle of taxation.