A new look at the two-mode problem

This paper considers the second-best policy problem that arises when auto travel is priced below its marginal cost and there is a substitute mass transit mode. We analyze the problem by combining a model of a rail line based on Kraus and Yoshida (J. Urban Econ. 51 (2002) 170) with the highway bottleneck model. The model involves a transit authority which optimizes, in addition to the fare, two dimensions of transit capacity. These are (1) the number of train units serving the route and (2) the capacity of an individual train unit. Under a very weak condition, second-best optimality involves expanding both dimensions of transit capacity. The larger percentage effect is on train capacity.     

Industrial energy efficiency: A look at the data

It is extremely difficult to make a precise, quantitative assessment of the impact of the myriad of factors affecting the improvement in industrial energy efficiency. It is certainly not correct to conclude that housekeeping measures alone have led to the observed improvement. Changing product mix among four digit SIC industries within the same two digit classification, variations in capacity utilization (returns to scale) and energy price increases as well as technological innovations have all contributed to part of the realized reduction in energy use per dollar value added over the period of investigation. Unfortunately, data limitations as well as modeling weaknesses prohibit an exact delineation of the impact of each of the factors on the increase in energy efficiency. The best that can be done—and quite convincingly so—is to qualitatively show that unequivocally these factors had an impact on the efficiency with which energy was used in the manufacturing process for the ten most energy intensive industries in the period 1971–1976.     

A look at productivity at the firm level in eight French service industries

In this paper, we take advantage of information collected by the French annual survey of market services to analyze productivity differences and changes among firms in eight major industries (restaurants, hotels, engineering, computer programming, computer processing, legal services, accounting and building cleaning), over the five-year period 1984–1988. We find a pattern of cross-sectional and time-series type estimates of the Cobb-Douglas production function, which is comparable to that typically found in studies of manufacturing industries, thus raising similar issues of interpretation and modeling. Using a capital stock measure corrected for rented equipment and building and taking into account the number of hours of work of work per employee improve these estimates to some extent. An interesting finding is that the output elasticity seems significantly smaller with respect to hours per employee than with respect to the number of employees.     

A further look at linkages between NAFTA equity markets

Recent research finds evidence for convergence among the North American equity markets and argues that this is generated by the North Atlantic Free Trade Accord (NAFTA). In this paper, we re-examine these conclusions and show that the documented cointegration property among the NAFTA equity markets was in fact confined to a sub-period in the late 1990s. We argue that the comovement was caused by the global boom in information technology shares and the resulting change in the sector mix of the value-weighted benchmark indexes used in prior work. We present evidence supporting this alternative hypothesis using an updated data set that includes global industry indexes. Our results have implications for transmission of information across global equity markets and international portfolio diversification.     

A new look at the relationship between time-series and structural econometric models

This paper examines the relationship between dynamic structural econometric models (SEM) and time series (TS) models. It extends the work of others by suggesting a reconciliation of SEM and TS models based on classical linear parameter restrictions in regression models rather than on time series methods. The paper demonstrates that in a number of common economic contexts there exist sets of plausible restrictions on the stochastic properties of the disturbances and on the dynamic adjustment processes in a SEM such that familiar structural models take on the form of univariate TS models. Consequently, it is argued that TS models should not be arbitrarily dismissed as being devoid of economic content.     

A fresh look at the contribution of project management to organizational performance

A better understanding of organizational performance and the contribution that project management can make is the aim. The article adopts the “Competing Values Framework,” a rich framework that is well established both theoretically and empirically but is not well known in the field of project management. The framework is summarized and applied in an empirical investigation of the contribution of project management in general and project management offices (PMOs) in particular to organizational performance. The examination of 11 case studies revealed multiple concurrent and sometimes paradoxical perspectives. The criteria proposed by the framework have been further developed through the identification of a preliminary set of empirically grounded performance indicators. The empirical results contribute to a better understanding of the role of project management generally and PMOs specifically. They also demonstrate the usefulness of this framework for the study of project management's contribution to organizational performance.     

Does immigration affect wages? A look at occupation-level evidence

Previous research has reached mixed conclusions about the effect of higher levels of immigration on the wages of natives. This paper reexamines this question using data from the Current Population Survey and the Immigration and Naturalization Service and focuses on differential effects by skill level. Using occupation as a proxy for skill, we find that an increase in the fraction of foreign-born workers tends to lower the wages of natives in blue collar occupations—particularly after controlling for endogeneity—but does not have a statistically significant negative effect among natives in skilled occupations. The results also indicate that immigrants adjusting their immigration status within the U.S., but not newly arriving immigrants, have a significant negative impact on the wages of low-skilled natives. This suggests that immigrants become closer substitutes for natives as they spend more time in the U.S.     

A new look at performance appraisal: The specimen check-list

The specimen check-list represents a breakthrough in appraisal because its format minimizes appraiser-errors common in rating, ranking, and essay appraisal methods. The specimen check-list requires the appraiser to diagnostically report behavioral incidents observed, based upon prompted recall.