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.     

Evaluation of American option prices in a path integral framework using Fourier–Hermite series expansions

In this paper we review the path integral technique which has wide applications in statistical physics and relate it to the backward recursion technique which is widely used for the evaluation of derivative securities. We formulate the pricing of equity options, both European and American, using the path integral framework. Discretising in the time variable and using expansions in Fourier–Hermite series for the continuous representation of the underlying asset price, we show how these options can be evaluated in the path integral framework. For American options, the solution technique facilitates the accurate determination of the early exercise boundary as part of the solution. Additionally, the continuous representation of the state variable allows the relatively accurate and efficient evaluation of the option prices and the delta hedge ratio.     

Do Immigrants Affect Firm‐Specific Wages?*

We propose and test a novel effect of immigration on wages. Existing studies have focused on the wage effects that result from changes in the aggregate labour supply in a competitive labour market. We argue that if labour markets are not fully competitive, immigrants might also affect wage formation at the most disaggregate level – the workplace. Using linked employer?employee data, we find that an increased use of low‐skilled immigrant workers has a significantly negative effect on the wages of native workers at the workplace – also when controlling for potential endogeneity of the immigrant share using both fixed effects and instrumental variables.     

Competition,Strategy, Technology and People: The Challenges Facing PR

A recent survey of leading UK PR practitioners has identified a dynamic, swiftly evolving environment for the public relations industry. Heightened competition, wide-ranging new opportunities and threats stemming from the perceived need to internationalize, the desire for more influence in clients' business strategy formulation, training and recruitment dilemmas, ever-changing technology and an increasing requirement to evaluate the worth of PR are only some of the most pressing issues. This article reviews the survey's findings—revealing a complex and swiftly evolving marketplace—before drawing out some of the principal implications. There are interesting parallels with events in advertising.     

Not Featherbedding,but Feathering the Nest: Human Resource Management and Investments in Information Technology

This study draws on employment relations and management theory, claiming that certain innovative employment practices and work structures pave the way for organizational innovation, namely investments in information technology (IT). It then finds support for the theory in a cross‐section of UK workplaces. The findings suggest that firms slow to adopt IT realize that their conventional employment model hinders their ability to make optimal use of new technologies. Therefore, the paper advances the literature beyond studies of unionization's impact on business investment to a broader set of issues on the employment relations features that make organizations ripe for innovation.     

Financial integration and the term structure of interest rates

This paper presents a model of the term structure for an open economy. A flexible VAR approach is used to model macroeconomic growth, inflation, short rate and the yield spread. Then the term structure is built given restrictions implied by the no-arbitrage condition. Contrary to previously proposed macrofinance models of the term structure, the model suggested here explicitly accounts for financial and real spillovers between economies. As documented in the paper, foreign macroeconomic factors contain a lot of information about the domestic term structure of yields. Put to data, the model explains the dynamics of yields very well. It provides better out-of-sample forecasting results than the closed economy models. Openness induces more variability in the estimated term premia of yields with shorter maturities.     

Live Broadcasting,Gate Revenue,and Football Club Performance: Some Evidence

This paper presents new evidence concerning the main argument of the English Premier League for collective arrangements in selling television broadcast rights. Matches that are broadcast live on television can be considered as a substitute for watching at the stadium. New panel-data show that broadcasting live has a small negative effect on gate revenue for the best performing clubs and a much larger effect for the worst performing clubs. However, the marginal cost is outweighed by the marginal revenue, concluding that restrictions on quantity stemming from collective arrangements are detrimental to the consumers, broadcasters, and clubs themselves.