Endogenous market power

In this paper we develop a framework to study markets with heterogeneous atomic traders. The competitive model is augmented as we provide traders with correct beliefs about their price impacts to define equilibrium with endogenously determined market power and show that such equilibrium exists in economies with smooth utility and cost functions and is generically determinate. Traders? price impacts depend positively on the convexity of preferences or cost functions of the trading partners and are subject to mutual reinforcement. Compared to the competitive model, the volume of trade is reduced, and hence is Pareto inefficient. The price effects of non-competitive trading depend on the convexity of marginal utility or cost function.     

Reliability Management in Competitive Electricity Markets

This paper examines market design issues for reliability management in competitive power markets. The institutional structure is characterized by a power exchange that conducts electricity market trading, a system operator that operates the electric power system, and a property right system for transimission pricing. In a competitive market, priority insurance fosters market information for determining efficient system reliability levels and induces system operator to maintain system security efficiently. A six-node network example is examined to illustrate the basic insights.     

THE FOUNDATION OF MARKET QUALITY ECONOMICS*

This study is based on my observation that high quality markets are indispensable for the healthy growth of a modern economy. Many problems surrounding markets are attributable to the lack of high quality markets. An industrial revolution creates extremely vibrant but unhealthy markets. This study introduces a concept of fairness in dealing and pricing (competitive fairness), which differs from efficiency, and defines market quality as a measure for the efficiency of allocation and the fairness of dealing and pricing. This study shows that competitive fairness is achieved by several market mechanisms that I constructed in my previous work.     

COMPETITION AND CROWDING OUT IN THE MARKET FOR OUTPATIENT SUBSTANCE ABUSE TREATMENT*

U.S. markets for outpatient substance abuse treatment (OSAT) include for‐profit, nonprofit, and public clinics. We study OSAT provision using new methods on equilibrium market structure in differentiated product markets. This allows us to describe clinics as heterogeneous in their objectives, their responses to exogenous market characteristics, and their responses to one another. Consistent with crowding out of private treatment, we find that markets with public clinics are less likely to have private clinics. In markets with low insurance coverage, low incomes, or high shares of nonwhite addicts, however, public clinics are relatively likely to be the sole willing providers of OSAT.     

A finite-life private-information theory of unsecured consumer debt

We present a theory of unsecured consumer debt that does not rely on utility costs of default or on enforcement mechanisms that arise in repeated-interaction settings. The theory is based on private information about a person's type and on a person's incentive to signal his type to entities other than creditors. Specifically, debtors signal their low-risk status to insurers by avoiding default in credit markets. The signal is credible because in equilibrium people who repay are more likely to be the low-risk type and so receive better insurance terms. We explore two different mechanisms through which repayment behavior in the credit market can be positively correlated with low-risk status in the insurance market. Our theory is motivated in part by some facts regarding the role of credit scores in consumer credit and auto insurance markets.     

Community rating and the market for private non-group health insurance

Prior research on adverse selection in health insurance markets has found only mixed evidence for adverse selection in group settings. We examine the impact of state community rating regulations enacted in the 1990s, which greatly limited insurers' ability to risk rate premiums, to determine if adverse selection is more evident in non-group insurance markets. Using data from large, national surveys we find evidence of a shift to a less healthy pool of non-group enrollees as a consequence of community rating. Community rating made healthy people 20 to 60% less likely to be insured by non-group health insurance; in addition, we found evidence that young and healthy people were 20 to 30% more likely to be uninsured as a result of community rating. We also find evidence that individuals in poor health were 35 to 50% more likely to be insured in the non-group market, but only limited evidence suggesting that persons in poor health were less likely to be uninsured. Our results are further supported by findings suggesting that non-group enrollees were sicker as a result of the community rating laws. Lastly, we find evidence suggesting that HMO penetration in the non-group market increased disproportionately in states that implemented community rating relative to states that did not.     

When prices hardly matter: Incomplete insurance contracts and markets for repair goods

This paper looks at markets characterized by the fact that the demand side is insured. In these markets, a consumer purchases a good to compensate consequences of unfavorable events, such as an accident or an illness. Insurance policies in most lines of insurance base indemnity on the insured's actual expenses, i.e., the insured would be partially or completely reimbursed when purchasing certain goods. In this setting, we discuss the interaction between insurance and repair markets by focusing, on one hand, upon the development of prices and the structure of markets with insured consumers, and, on the other hand, the resulting backlash on optimal insurance contracting. We show that even in the absence of ex post moral hazard the extension of insurance coverage will lead to an increase in prices as well as to a socially undesirable increase in the number of repair service suppliers if repair markets are imperfect.     

Why is the market for long-term care insurance so small?

Long-term care represents one of the largest uninsured financial risks facing the elderly in the United States. We present evidence of supply side market failures in the private long-term care insurance market. In particular, the typical policy purchased exhibits premiums marked up substantially above expected benefits. It also provides very limited coverage relative to the total expenditure risk. However, we present additional evidence suggesting that the existence of supply side market failures is unlikely, by itself, to be sufficient to explain the very small size of the private long-term care insurance market. In particular, we find enormous gender differences in pricing that do not translate into differences in coverage, and we show that more comprehensive policies are widely available, if seldom purchased, at similar loads to purchased policies. This suggests that factors limiting demand for insurance are also likely to be important in this market. Our evidence also sheds light on the likely nature of these demand-side factors.     

Taxation,insurance, and precautionary labor

We examine optimal taxation and social insurance with adverse selection in competitive insurance markets. In a previous literature, it has been shown that, with perfect insurance markets, social insurance improves welfare since it is able to redistribute without creating distortions. This result has been taken as robust to the introduction of adverse selection as this would only provide additional justifications for social insurance. We show, however, that adverse selection can weaken the case for social insurance compared to a situation with perfect markets. Whenever social insurance mitigates private underinsurance, it also causes welfare-reducing effects by decreasing precautionary labor supply and hence tax revenue. In addition, adverse selection may reduce the redistributive potential of social insurance. We illustrate our general results using different equilibrium concepts for the insurance market. Notably, we derive conditions under which a complete renunciation of social insurance is optimal and the government only relies on income taxation to achieve its redistributive objectives.     

Imperfect competition in agricultural markets: evidence from Ethiopia

Drawing upon unique transaction-level data from rural Ethiopia, this paper tests for general forms of imperfect competition among rural wholesale traders. These are key to the grain distribution system as they purchase from farmers and perform interregional trade. Tests show that traders in a typical source market engage in imperfectly competitive behavior in purchasing from farmers, driving down the price paid to farmers approximately 3%. In contrast, there is no conclusive evidence of imperfect competition among traders in the larger, more centrally located market studied. Thus, efficiency losses due to market structure are likely to be greatest in markets which also have poor road links and lesser volumes of marketed grain.     

Competition between insurers with superior information

We analyze markets where insurers are better informed about risk than consumers. We show that even competitive markets may result in insufficient information revelation and inefficient insurance coverage. This explains why certain risky consumers remain uninsured and why certain market segments are persistently profitable. We also show robustness to competition in menus or mechanisms. Our analysis of the “contrary of adverse selection” (competition between principals with common value and exclusivity) is suitable for other markets (lawyers, doctors, mechanics, etc.).     

Market characteristics,intra-firm coordination,and the choice of human resource management systems: Theory and evidence

This paper begins by constructing a team-theoretical model of organizational adaptation and coordination with three distinct task coordination modes: vertical control, horizontal coordination, and hybrid coordination. The model is then used to provide fresh insights on complementarities involving team work organization, communication channels, training and hiring, and other human resource management practices, and illustrate how such choice of practices is affected by the firm's output market conditions. Our econometric analysis of new data from Japan which provide up-to-date information on the adoption of new team-based instruments for a horizontal coordination system (cross-functional problem solving project teams and Self-Managed Teams) yields results that are broadly consistent with the theory. First, new team-based instruments are more likely to be adopted by firms with well-established formal shop-floor-based communication channels (such as shopfloor committees), while they are much less likely to be adopted by firms with well-established information sharing institutions such as joint labor-management committees, which presumably enhance the efficiency of the vertical control system by minimizing labor-management communication errors. Finally, firms in more competitive markets and those with a higher concentration of sales among a small number of customers are more likely to adopt both types of team, whereas firms facing more erratic price movement tend not to adopt Self-Managed Teams.     

Welfare effects of competitive lobbying efforts in international oligopoly markets

Conventionally, rent-seeking activities have been considered to deteriorate social welfare and to distort resource allocation. This paper examines whether rent-seeking behavior can improve social welfare by focusing on the welfare effects of firms’ competitive lobbying efforts when governments can impose market entry regulation against foreign firms. We demonstrate that competitive lobbying efforts can improve social welfare when such lobbying efforts are directed to reduce market entry barriers. In addition, social welfare can be maximized when the government shows the maximum sensitivity to the foreign firm's political contributions while maintaining competitive market structure. Moreover, it is shown that the dominant strategy for a domestic firm is to allocate more resources to R&D sectors while it is optimal for foreign firms is to exert more efforts in lobbying to reduce the market entry barriers when a government makes political economic approach in market entry regulations.     

What Collusion? Unilateral Market Power as a Catalyst for Countercyclical Markups

This paper presents and tests a simple model of competitive and unilateral market power regimes that yields countercyclical markups. Following a decrease in demand in the short run, capacity-constrained firms may have a strong incentive not to lower their prices to the new competitive price. Demand shocks may introduce market power into a previously competitive market. Experimental posted offer markets support this conjecture with complete information on the market structure. With only private information, there appears to be a hysteresis effect concerning supracompetitive prices, i.e., markets with a history of supracompetitive pricing continue to generate supracompetitive prices following demand shocks. However, competitive markets also remain competitive following demand shocks when firms only have private information on costs and capacities.     

On the Determinants of Labour Market Institutions: Rent Seeking vs. Social Insurance

What determines the structure of labour market institutions? I argue that common explanations based on rent seeking are incomplete. Unions, job protection and egalitarian pay structures may have as much to do with social insurance of otherwise uninsurable risks as with rent seeking. In support of this more benign complementary hypothesis the paper presents a range of historical, theoretical and cross‐country evidence. The social insurance perspective changes substantially the positive analysis of the future of European labour market institutions. It is not clear that globalization and the ‘new economy’ will force countries to make their labour markets more flexible. These phenomena will probably increase the efficiency costs of existing institutions, but they may also make voters more willing to pay a high premium to preserve institutions that provide insurance.     

Price effects of multimarket contact among movie chains in small US metropolitan areas

Movie theater chains are ubiquitous in major metropolitan areas of the US, with generally two or more of these large chains present. However in smaller metropolitan areas, we see far more variation in the role of these chains. This allows for an opportunity to see whether multimarket contact (MMC) among these firms has an impact on movie pricing in these smaller markets. In this paper, data on movie pricing, market structure, and income and population characteristics are obtained for 79 small metropolitan areas–those with under 250,000 people–which are not part of larger “consolidated” metropolitan areas. A crude measure of MMC is found to indeed be related to price increases in the smallest of these markets.     

Carbon sequestration and permit trading on the competitive fringe

This paper makes two contributions to the carbon-sequestration policy literature. First and foremost, we develop a theoretical framework in which sequestration and permit-trading markets are analyzed jointly in the context of a competitive fringe model. Our framework formalizes the linkage between regulatory policy changes (as they manifest themselves in the permit market) and subsequent equilibrium allocations in the sequestration market. Second, we perform a numerical analysis demonstrating the role market structure, or market power, might play in the determination of the equilibrium sequestration allocation and carbon price. Both our analytical and numerical results demonstrate the importance of incorporating into empirical supply-side models demand-side information that is reflective of an underlying market structure.     

Insurance,self-protection,and the economics of terrorism

This paper investigates the rationale for public intervention in the terrorism insurance market. It argues that government subsidies for terror insurance have the effect of discouraging self-protection and limiting the negative externalities associated with self-protection. Cautious self-protective behavior by a target can hurt public goods like national prestige if it is seen as “giving in” to the terrorists, and may increase the loss probabilities faced by others by encouraging terrorists to substitute toward more vulnerable targets. We argue that these externalities in protection are essential for normative analysis of government intervention in insurance markets and may also explain why availability problems in this market have engendered much stronger government responses than similar problems in other catastrophe insurance markets.     

Competition and inter-firm credit: Theory and evidence from firm-level data in Indonesia

Using firm-level data we investigate the relationship between trade credit and suppliers' market structure and find a ∩-shaped relationship between competition and trade credit, with a discontinuous increase in credit provision between monopoly and duopoly. This “big jump” arises because monopolists are more likely to not offer any trade credit than firms in competitive environments. Our model exploits the fundamentally different nature between cash and trade credit sales, arguing that firms are unable to commit ex ante to a trade credit price. We show that monopolists will often sell only on cash, while credit is always provided in competitive environments.