Insurance monopoly and renegotiation

Summary The mechanism design problem of a monopoly insurer — faced with privately informed insurees — is considered. It is assumed that the insurer cannot commit not to renegotiate (by using the information that customer separation reveals) before contracts are put into force. A solution is offered by modeling renegotiation-proofness in a framework inspired by Greenberg's theory of social situations. Maximizing profit within the set of renegotiation-proof outcomes always leads to a semi-separating outcome (i.e. neither full pooling nor full separation can occur) and may leave all low-risks as well as some of the high-risks self-insured.This work originated with Asheim and Nilssen (1991). The authors thank Paul Beaudry, Mathias Dewatripont, John Hillas, Terje Lensberg, Georg Nöldeke, Trond Olsen, Michel Poitevin, Eric van Damme, and especially Joseph Greenberg, as well as participants at seminars in Bergen, Cambridge, Florence, Helsinki, London, Mons, Montreal, Oslo, Stony Brook, and Tilburg for helpful comments and discussions. Asheim thanks Tilburg (CentER), McGill and Humboldt Universities for their hospitality and acknowledges support from the Norwegian Research Centre in Organization and Management and the Norwegian Research Council. Nilssen acknowledges support from Norges Bank and the Norwegian Research Council for Science and the Humanities.     

Robust monopoly pricing

We consider a robust version of the classic problem of optimal monopoly pricing with incomplete information. In the robust version, the seller faces model uncertainty and only knows that the true demand distribution is in the neighborhood of a given model distribution. We characterize the pricing policies under two distinct decision criteria with multiple priors: (i) maximin utility and (ii) minimax regret. The equilibrium price under either criterion is lower then in the absence of uncertainty. The concern for robustness leads the seller to concede a larger information rent to all buyers with values below the optimal price without uncertainty.     

Planned obsolescence and monopoly undersupply

This paper examines the welfare implications of planned obsolescence in situations where the traditional monopoly undersupply exists. We find that the monopolist’s introduction of incompatibility between successive generations of products alleviates the monopoly undersupply problem and may therefore generate higher social welfare than compatibility. Paradoxically, the stronger the network effects, the more likely welfare will increase as a result of incompatibility. Our result also extends to two-sided markets characterized by indirect network effects.     

Natural monopoly and differential pricing

Under uniform pricing a monopolist cannot make a positive profit in equilibrium. I analyze how differential pricing can be exploited by a natural monopolist to deter entry when entry is costless. In a two-stage game with price competition before quantity competition I show that the incumbent firm can deter entry and make a positive profit in equilibrium. The incumbent sets two different prices, the low price to deter entry and the high price to generate profit. Entry is not possible because of scale effects. If dumping is allowed for all firms no positive profits are realizable, but welfare is reduced. I show that for some parameter values the incumbent is forced to engage in a stunt (i.e., set a negative low price) to keep entrants out.     

Corporate monopoly power and risk

The relationship between monopoly power and concentration may be influenced by the ‘riskiness’ of the firm. Two related issues are considered in this paper: the impact of market structure and conduct on the risk of the firm and the impact of risk upon the relationship between profitability and concentration. An a priori relationship between risk, market structure and profitability is derived within the mean-variance framework of the Capital Asset Pricing Model.     

A test of monopoly price dispersion under demand uncertainty

A test of the predictions of Dana’s (2001) model of monopoly price dispersion under demand uncertainty using ticket price data from Major League Baseball shows that ticket price dispersion changes systematically with demand uncertainty, verifying the predictions of the model.     

A note on dynamic monopoly pricing under consumption externalities

We analyze dynamic monopoly pricing under consumption externalities, focusing on pricing under negative externalities. We also attempt to generalize models in the previous literature, which encompass both negative and positive externalities, by incorporating a consumer’s discount factor for past sales as a parameter. Analyzing our model reveals oscillation as the optimal price path in the presence of negative externalities.     

A market test for natural monopoly in local exchange

Is the incumbent local exchange carrier (LEC) a natural monopolist? The analysis indicates that the LEC cost function is not supportable: LECs appear to be either nonsustainable natural monopolies or non natural monopolies over the set of services they currently offer. However, recent technological changes suggest that whether LECs are natural monopolies over their current offerings is immaterial for policy making, because competitors are enjoying economies of scope in offering both LEC and non LEC services. Based on these results, deregulation of LECs is discussed in a Type I/Type II error framework.     

Regulating monopoly price discrimination

There is a substantial literature assessing the impact of entry restrictions created by state certificate-of-need (CON) programs on hospital and nursing home markets, but comparatively little research has focused on CON for home health agencies (HHAs). We assessed the impact of state CON programs for HHAs, and for potential substitute service providers, on quality ratings for HHAs. HHA quality ratings were obtained from the Home Health Compare database developed by the Centers for Medicare and Medicaid Services (CMS) for the last quarter of 2010 through the last quarter of 2013. The HHA-level data were augmented with county-level area characteristics for each HHA in the CMS database. An ordered logit model was used to estimate the association between state CON restrictions and Low, Medium, and High quality categories, adjusted for HHA and area characteristics. The results indicated that HHAs in states with CON for HHAs were less likely to have High quality ratings, and more likely to have Medium quality ratings, compared to agencies in states without CON for home health. Additional research is needed to assess whether the apparent adverse impact of CON on HHA quality is related to diminished competition among HHAs in states with CON.     

A model of benefit and tax share discrimination by a monopoly bureau

This paper integrates the theory of demand for publicly provided goods in a democracy with the theory of bureaucratic supply in order to develop a model of benefit share and tax share discrimination by a monopoly bureau. The demand side of the political market is based on a utility maximizing model of voter behavior with voters' demands aggregated through a majority voting process. The supply side of the political market is based on a budget maximizing model of bureaucratic behavior. The bureau is assumed to possess monopoly power as a result of either its control over benefit shares or tax shares and, hence, implicit tax prices or its control over budget proposals placed on the agenda. Different degrees of discrimination are examined and in each case the equilibrium of the model yields a total budget for the bureau as well as distributions of benefit shares or tax shares across voters.     

Capacity expansion and dynamic monopoly pricing

We substitute to the plant size problem, as investigated by Chenery [Chenery, H., 1952. Overcapacity and the acceleration principle. Econometrica], a new version in which a profit-maximizing monopolist may combine its investment policy with a price policy adjusting demand upwards or downwards over time. We characterize the optimal price and investment policies. The optimal price policy determines an investment pattern either with constant increments of capacity over time, or becoming constant after a finite time. The existing capacity is either fully used at each instant between two investment dates; or the monopolist first quotes the instantaneous monopoly price and, thereafter, the price dampening instantaneous demand at the optimal installed capacity level.     

Entry deterrence and innovation in durable-goods monopoly

This paper investigates the efficiency of innovation investments in a durable-goods monopoly when a potential entrant threatens to innovate as well. We show that the durability of the good endows the monopolist with the power to discourage rival innovation since current sales alter the demand for a new generation of the good. The equilibrium is therefore determined not only by the incentive for intertemporal price discrimination in durable-goods monopoly, but also by the incumbent's concern for maintaining the technological leadership. We demonstrate that entry deterrence followed by no innovation always implies underinvestment in innovation.     

A note on the value of public information in monopoly

The paper shows that in the standard model of monopoly with asymmetric information and second-degree price discrimination, the monopolist prefers to reveal public information under a form of stochastic dependence that is weaker than the affiliation of private values, private signals, and public signals.      

Political entrepreneurship and bidding for political monopoly

An analytical framework for dealing with political entrepreneurship and reform is proposed which is based on some new combinations of Schumpeterian political economy, an extended version of Tullock's model of democracy as franchise-bidding for natural monopoly and some basic elements of New Institutional Economics. It is shown that problems of insufficient award criteria and incomplete contracts which may arise in economic bidding schemes, also – and even more so – characterise political competition. At the same time, these conditions create leeway for Schumpeterian political entrepreneurship. The same is true for various barriers to entry in politics. These barriers affect a trade-off between political stability and political contestability which will be discussed with special emphasis on incentives and opportunities for political entrepreneurship in the sense of risking long-term investments in basic political reforms.     

Second degree price discrimination and natural monopoly

This paper considers the efficiency of a contestable natural monopoly if consumers are heterogeneous and the monopolist can differentiate prices imperfectly. The paper shows that a “no‐distortion‐at‐the‐top” result, which is standard in models with restricted entry, may also appear in a contestable market. Depending on cost and demand structures, first best efficiency can also be a sustainable equilibrium. However, due to the existence of a continuum of equilibria, first best efficiency is not guaranteed. Most notably, even a stable “distortion‐at‐the‐top” result is possible.