Recent Antitrust Enforcement Actions by the U.S. Department of Justice: A Selective Survey of Economic Issues

This paper discusses some of the most interesting economic issues raised by U.S. Department of Justice Antitrust Division proceedings that had significant developments between June 1, 2001 and May 31, 2002. The paper reviews six recent merger enforcement actions and three actions involving unilateral anticompetitive conduct.     

Job longevity as a situational factor in job satisfaction.

This study investigates the relationships between overall job satisfaction and the five task dimensions of skill variety, task identity, task significance, autonomy, and feedback-from-job for employees at different stages of their careers, as measured by their length of employment on their current jobs, as well as in their current organizations. Basically, the analysis shows that the strength of the relationships between job satisfaction and each of the task dimensions depends on both the job longevity and organizational longevity of the sampled individuals. For employees new to an organization, for example, only task significance is related positively to job satisfaction, while autonomy has a strongly negative correlation. The study presents other significant correlational differences and discusses the implications of its findings for task design, as well as for managing new employees. Approximately 3500 respondents from four different governments--two metropolitan, one county, and one state--participated in the collection of survey data.     

Innovation, Rent Extraction, and Integration in Systems Markets

We consider innovation incentives in markets where final goods are systems comprising two strictly complementary components, one of which is monopolized. We focus on the case in which the complementary component is competitively supplied and innovation is important. We explore ways in which the monopoly may have incentives to extract efficiency rents in the competitive sector, thus weakening or destroying incentives for independent innovation. We discuss how these problems are affected if the monopolist integrates into supply of the complement.     

Cost-comparison of two trabecular micro-bypass stents versus selective laser trabeculoplasty or medications only for intraocular pressure control for patients with open-angle glaucoma

Aim: Patients with open-angle glaucoma (OAG) whose intraocular pressure is not adequately controlled by one medication have several treatment options in the US. This analysis evaluated direct costs of unilateral eye treatment with two trabecular micro-bypass stents (two iStents) compared to selective laser trabeculoplasty (SLT) or medications only.

Materials and methods: A population-based, annual state-transition, probabilistic, cost-of-care model was used to assess OAG-related costs over 5 years. Patients were modeled to initiate treatment in year zero with two iStents, SLT, or medications only. In years 1–5, patients could remain on initial treatment or move to another treatment option(s), or filtration surgery. Treatment strategy change probabilities were identified by a clinician panel. Direct costs were included for drugs, procedures, and complications.

Results: The projected average cumulative cost at 5 years was lower in the two-stent treatment arm ($4,420) compared to the SLT arm ($4,730) or medications-only arm ($6,217). Initial year-zero costs were higher with two iStents ($2,810) than with SLT ($842) or medications only ($996). Average marginal annual costs in years 1–5 were $322 for two iStents, $777 for SLT, and $1,044 for medications only. The cumulative cost differences between two iStents vs SLT or medications only decreased over time, with breakeven by 5 or 3 years post-initiation, respectively. By year 5, cumulative savings with two iStents over SLT or medications only was $309 or $1,797, respectively.

Limitations: This analysis relies on clinical expert panel opinion and would benefit from real-world evidence on use of multiple procedures and treatment switching after two-stent treatment, SLT, or polypharmaceutical initial approaches.

Conclusions: Despite higher costs in year zero, annual costs thereafter were lowest in the two-stent treatment arm. Two-stent treatment may reduce OAG-related health resource use, leading to direct savings, especially over medications only or at longer time horizons.     

日光采集技术(译文)

以保持居民照明首选亮度为基础,审视了各种可供选择的日光采集节能方案;重点探讨了电子调光整流器、电子调光控制器、回应性窗玻璃贴膜、电动遮光帘、电动遮荫蓬等新技术;人们对于自然光照明需求响应系统的需要,对于使用可再生能源的渴望,以及对于自然光照明系统优点的认识,都促成了人们对日光照明系统日益增长的兴趣。