Efficiency outcomes of market concentration and managed care

The paper examines how hospital cost efficiency has reacted to extensive horizontal integrations of hospitals and rapid growth of managed care in the US health care industry. Cost efficiency is estimated by using panel data approaches to relax the assumptions for the hospital effects imposed in earlier studies. The paper shows that higher managed care penetration over time is associated with greater hospital efficiency, and higher market concentration is positively associated with efficiency when markets are highly competitive or highly concentrated.     

Strong price of anarchy

A strong equilibrium is a pure Nash equilibrium which is resilient to deviations by coalitions. We define the strong price of anarchy (SPoA) to be the ratio of the worst strong equilibrium to the social optimum. Differently from the Price of Anarchy (defined as the ratio of the worst Nash Equilibrium to the social optimum), it quantifies the loss incurred from the lack of a central designer in settings that allow for coordination.We study the SPoA in two settings, namely job scheduling and network creation. In the job scheduling game we show that for unrelated machines the SPoA can be bounded as a function of the number of machines and the size of the coalition. For the network creation game we show that the SPoA is at most 2. In both cases we show that a strong equilibrium always exists, except for a well defined subset of network creation games.     

East Meets West: A Cross-Cultural Comparison of Charismatic Leadership Among Canadian and Iranian Executives

ABSTRACT This study first develops an empirically based Western charismatic leadership profile. Using confirmatory factor analysis, the profile is compared with a profile of Iranian managers. The results demonstrate that despite major cultural differences in the two countries, there are core similarities in the profiles across the two cultures. The Canadian charismatic profile of vision, tenacity, intellectual challenge, self-sacrifice, and eloquence is substantially confirmed within the Iranian sample. But we also show that Iranian managers' ratings are significantly lower than those of the Canadian managers, indicating potentially different behavioural manifestations. The paper speculates that while the differences are probably due to cultural differences, the similarities may be due to universal intrinsic human desire for morality, autonomy, and achievement.     

Interpretive structural modeling of quality factors in both medical and hospitality services in the medical tourism industry

This study aims to theoretically integrate quality factors of both medical and hospitality services in medical tourism. Medical tourism comprises both medicine and tourism. Although the core product in medical tourism is medical treatment, attractive hospitality and travel options are also essential. Despite the dual nature of medical tourism, the two aspects of this concept have not been integrated in a unique framework. This study attempts to fill this gap using interpretive structural modeling (ISM). According to ISM, although factors of medical services and hospitality services are independent from each other, these factors have vital impacts on perceived value, satisfaction, and loyalty.     

Does investor protection affect the choice of earnings management methods through real activity manipulation and accrual manipulation？ Asian comparison

This paper examines systematic differences in earnings management through real activity manipulation and accrual manipulation across 7 Asia countries. The study proposes arguments that in economies with high investor protection, managers prefer to manage earnings through real activity manipulation rather than through accrual manipulation because accrual manipulation is more likely to draw auditors or regulators scrutiny than real decisions about pricing and production. The study findings are consistent with prediction. Despite being in economies with high investor protection, managers still have bigger discretion in managing earnings through real activities rather than accrual manipulation.     

Tunneling, overlapping owner and investor protection： Evidence from merger and acquisition in Asia

Tunneling is to describe transfer resource out of the firm for benefit of their controlling shareholders. Better legal protection and stronger social norms improve minority shareholders＇ protection from expropriation. They consequently reduce the private benefits of controlling shareholders （La Porta, 1999）. This study aims to investigate tunneling in the context merger and acquisition （M＆A） and to examine whether tunneling occurs only in emerging markets with poor law enforcement or whether it also occurs in developed countries. This study documents that managers are more likely to overpay target in merger and acquisition with high overlapped owner which have stakes in bidder and target firm. That overpayment, a transfer of wealth from owners of bidder＇s firm to overlapping owners, is a type of tunneling. This study concludes that tunneling occurs in nations not only with low investor protection, but also with high investor protection.     

The effects of labor supply shocks on labor market outcomes: Evidence from the Israeli–Palestinian conflict

Since September 2000, as a result of mobility restrictions, the supply of Palestinian workers competing for local jobs in the West Bank has increased by about fifty percent. This paper takes advantage of this unique natural experiment to study the effects of labor supply shocks on labor market outcomes. Using quarterly information on wages and employment in each city in the West Bank, the paper analyzes the short-run adjustment of labor markets to a large inflow of workers separately from the effects of political instability. The results suggest that low-skilled wages are adversely affected by an increase in the supply of low- and high-skilled workers, while high-skilled wages are only weakly negatively related to an increase in their own supply. This is consistent with a scenario in which high-skilled workers compete for low-skilled jobs, pushing the low-skilled into unemployment. This latter hypothesis is confirmed by analyzing the effects of changes in labor supply on unemployment.     

Are risk‐averse agents more optimistic? A Bayesian estimation approach

Our aim is to analyze the link between optimism and risk aversion in a subjective expected utility setting and to estimate the average level of optimism when weighted by risk tolerance. Its estimation leads to a non‐trivial statistical problem. We start from a large lottery survey (1536 individuals). We assume that individuals have true unobservable characteristics. We adopt a Bayesian approach and use a hybrid MCMC approximation method to numerically estimate the distributions of the unobservable characteristics. We find that individuals are on average pessimistic and that pessimism and risk tolerance are positively correlated. Copyright © 2008 John Wiley & Sons, Ltd.     

Is There a Trade-Off Between Accrual-Based and Real Earnings Management Activities in the Presence of (fe) Male Auditors?

Journal of Business Ethics - Prior research suggests that the presence of high-quality auditors (i.e. proxied by audit firm characteristics) constrains accrual-based earnings management, but it...     

Small firms,bigger changes: health insurance coverage take-up rates in small firms after the ACA

Measuring the impact of the Affordable Care Act of 2010 (ACA) on employer-sponsored health insurance is essential in an era of constant changes to health policy. Using data from the Kaiser Family Foundation Employer Survey, we focus on firms with fewer than 50 employees in order to isolate the effect of the ACA on small firms. We utilize a differences‐in‐differences approach with a time fixed effect structure to provide analysis for a treatment group of small firms and a control group of large firms. After excluding firms with grandfathered plans, we find that the ACA provisions reduced health insurance coverage take-up rates in small firms by 1.96 to 2.67 percentage points (compared to large firms).