An analysis of air mass effects on rail ridership in three US cities

This paper examines whether daily weather affects ridership in urban transportation systems. When examining human–weather relationships, it is often advantageous to examine air masses, which take into account the entire parcel of air over a region. Spatial synoptic classification characterizes air masses based upon numerous meteorological variables at a given location. Thus, rather than examining temperature or precipitation individually, here we compare daily ridership to synoptic air mass classifications for three urban rail systems: Chicago Transit Authority (CTA), Bay Area Rapid Transit (BART), and the Hudson–Bergen light-rail line in northern New Jersey. Air masses are found to have a significant impact on daily rail ridership, with usage typically increasing on dry, comfortable days and decreasing on moist, cool ones, particularly on weekends. Although the comfort of a particular air mass changes throughout the year, seasonality is not a significant factor with respect to the air mass–ridership relationship. The results of this study can benefit rail system managers who must predict daily ridership or in the development of cost-benefit analyses for station improvements.     

Counter-intuitive effects of domestic law enforcement policies in the United States

In spite of the increase in domestic law enforcement policies in the U.S. drug related crime has followed a non-monotonic trend and cocaine and heroin prices, instead of increasing, have been dropping or remained stable over time. All this in a context of an increase in these drugs’ consumption during the 1980s and a small decrease during the 1990s. This paper provides an explanation to these counter-intuitive effects of domestic law enforcement policies. We model how drug lords respond to this type of policy within a conflict framework over the control of distribution activities for illegal drugs, which is novel. The model predicts drug distribution activities, drug prices and drug consumption. These predictions appear to be consistent with the empirical evidence in the United States.     

Understanding evolutionary processes in non-manufacturing industries: Empirical insights from the shakeout in pharmaceutical wholesaling

Although the empirical pattern of industry shakeout has been documented for many manufacturing industries, we know little about the processes by which market structure evolves in non-manufacturing service industries. This paper establishes detailed empirical observations about the consolidation of a single non-manufacturing industry, the wholesale distribution of pharmaceuticals. These observations are used to explore differences between manufacturing and wholesaling in both the patterns and explanations for consolidation and analyze the explanatory power of theories that link consolidation to technological change. The analysis demonstrates that theories developed to explain consolidation in new manufacturing industries have varying degrees of applicability to the consolidation of drug wholesaling. The observed patterns of exit, innovation, and growth suggest important modifications to evolutionary theories of market structure.     

The new local economics: A reply to John Benington

Attempts are being made to construct a “new local economics” and important claims are being made on its behalf. In present circumstances, its contribution, though with some valuable achievements as John Benington has shown, must nevertheless be marginal. The task is to gain the maximum leverage from minimal resources, and this article suggests that the key priorities should be to use local authorities' influence as purchasers, employers and investors.     

Reviews

DEPRIVATION IN THE OUTER CITY.

Barke, M. and Turnbull, G. 1992: Meadowell: The Biography of an “Estate with Problems”. Aldershot: Avebury, £32.00 cloth.

CHANGING BOUNDARIES OF RACE.

Jones, Trevor. 1993: Britain's Ethnic Minorities. PSI,

£15.

ENTERPRISE IN ARCADIA?

Curran, J. and Storey, D. (eds), 1993: Small Firms in Urban and Rural Locations, London and New York: Routledge, £40, hardback.

MAKING CONNECTIONS.

Turok, I. 1993: Loose connections? Foreign investment and local linkages in “Silicon Glen” Strathclyde Papers on Planning, 23. Centre for Planning, University of Strathclyde, 50 Richmond Street, Glasgow, G1 1XN. £4.00, paper.

COWLEY: THE END OF THE LINE?

Hayter, T. and Harvey, D. (eds) 1993: The Factory and the City: the Story of the Cowley Automobile Works in Oxford. London: Mansell, £40, hardback.

UPDATING SECTOR APPROACHES.

Geddes, M. and Benington, J. (eds) 1992: Restructuring the Local Economy. Harlow: Longman, £22.00, paper.

BORN AGAIN LOCAL GOVERNMENT?

Hodge, M. and Thompson, W. 1994: Beyond the Town Hall: Reinventing Local Government. Fabian Pamphlet, £3.90.     

Operations change interactions in a service environment: Attitudes,behaviors, and profitability

An attitudinal and behavioral change program was developed and implemented in a service operations function. Changes were (1) stabilizing operations management (reducing turnover) and (2) improving attitudes and behaviors of employees with strong union affiliations in a common carrier trucking terminal when compared to similar employees in a control terminal undergoing no planned change. Management turnover was reduced. Other results from the eighteen-month longitudinal study indicated that employee attitudes in both groups remained negative toward work, management, and the company throughout the study period. Behaviors relating to attitudes — particularly turnover, absenteeism, and accident rates—improved at the experimental terminal, even though expressed attitudes remained negative. Operating efficiencies and profitability improved at the experimental terminal. It was found that these employees, pick-up and delivery drivers, retain positive attitudes toward customers and customers the same toward them, in spite of the drivers' negative attitudes toward the company. The operative service employee appeared to discriminate between attitudes toward the company and the customer; the drivers' negative attiudes toward most everything (except the customer) not affecting the customer's perceptions of the driver or the company.     

Assessing self-selection and endogeneity issues in the relation between activity-based costing and performance

Studies investigating the relation between ABC adoption and performance are inconclusive and plagued with econometric problems. This study extends prior research to investigate the association between ABC adoption and four manufacturing plant performance measures (cycle-time improvement, quality improvement, cost improvement, and profitability) and to assess selection bias and the endogenous nature of their relationship. I use the Heckman (1979) model to assess sample selection bias and the Wooldridge (2002) 2SLS-IV approach, to investigate endogeneity. After controlling for sample selection bias and endogeneity, the coefficient of ABC under the Heckman method and ABC_fit under the 2SLS-IV method becomes significantly higher compared to the coefficient of ABC under the OLS method. In addition, both the inverse Mills ratio, under the Heckman model, and Hausman F-test, under the Wooldridge 2SLS approach, are positive and significant, confirming the presence of both sample selection bias and endogeneity. Overall, I find that controlling for sample selection bias and endogeneity is essential in properly assessing the significance of ABC-performance association.