Relative price changes and deviations from purchasing power parity

During recent years, exchange rate fluctuations have exceeded variation in price indices. As a result, a number of theories have been developed to explain the apparent ‘overshooting’ of the exchange rate. The purpose of this paper is to argue that such elaborate extensions may be unnecessary, because the law of one price is more robust than previously believed. In particular, it can be shown that the law of one price is consistent with the observed variability of exchange rates and that it outperforms the overshooting models in explaining the stochastic behavior of exchange rates and interest rates.     

Asymmetric information and portfolio performance measurement

This note argues that though Dave Mayers and Edward Rice were able to show that the CAPM could be used to detect superior investors in a world of asymmetric information, their demonstration does not resurrect the CAPM as a practical tool for performance measurement. To employ the Mayers-Rice model, an investment advisor would first have to determine that the CAPM holds for uninformed investors. As a means of avoiding the problem of testing the CAPM, a performance measure based only on returns is outlined. The measure is robust in that it would correctly designate superior investors in context of the CAPM, the arbitrage pricing model and many other equilibrium models of security pricing.     

Creativity in buyer–seller relationships: The role of governance

This research proposes a framework for relating governance mechanisms (power, contracts, and trust) to the generation of creative approaches to business activities in buyer–seller relationships. The framework is tested with a survey of 262 purchasing agents. The results indicate that trust and contract affect the three facilitators of inter-organizational creativity: (1) knowledge-sharing routines (resources), (2) learning orientation (motivation), and (3) managerial support and open-mindedness (managerial practices). Also, the effects of trust and contract on the creativity in buyer–seller relationships are fully mediated by the above three facilitators. In particular, trust plays a more influential role in stimulating creativity. While power is not significantly associated with any of the facilitators, its overall effect on creativity is negative.     

Partnerships, Profit Sharing, and Quality Competition in the Medical Profession

This paper contains a theoretical model of medicalpartnerships with individual quantity and qualitychoice. The firm selects price, the number ofpartners and profit sharing. The firm encouragesinter-firm quality competition and discouragesintra-firm quality competition through differentialprofit sharing. An empirical model using data from anationwide survey of medical practices supports thetheoretical results. Further, empirical resultssupport the view that time per visit can be used as aproxy index for quality in the primary carephysician market.     

APT VS. CAPM ESTIMATES OF THE RETURN-GENERATING FUNCTION PARAMETERS FOR REGULATED PUBLIC UTILITIES

In public utility rate hearings, there are extensive arguments concerning the most appropriate model of the return-generating function. Bower, Bower, and Logue (1984) suggest that the APT is superior to the CAPM, but their results have troublesome ranking differences between the two models when applied to returns from electric versus natural gas utilities. The purposes of this paper are to develop forward estimates of the parameters for both of these models applied to five different utility portfolios of electric and natural gas companies at a point in time, and to test whether these estimates are valid during a subsequent or future period. Also, forecasting errors for each model are compared to determine which model is best and to ascertain if there are any ranking conflicts. There are no ranking conflicts with the models as the market model consistently underestimates the actual return. Thus, the analysis suggests that the arbitrage model is a superior representation of the return-generating process of these utilities.     

Labor Market Segmentation and the Implications for Public Sector Retrenchment Programs

Despite the importance placed on reducing public sector employment in sub-Saharan Africa, remarkably little is known about the labor market transition paths of departing public sector workers. This paper uses household survey data from Conakry, Guinea to establish evidence of labor market segmentation between the wage and nonwage sectors. An empirical model of the unemployment durations experienced by departing public sector workers finds that transition paths vary significantly according to personal characteristics that also affect the resulting earnings opportunities in segmented labor markets. Particularly, there is a marked tendency of females to enter quickly the nonwage sector, relative to males, and a negative influence of severance payments on wage sector employment acceptance.J. Comp. Econom.,December 1997,25(3), pp. 385–402. Department of Agricultural and Applied Economics, Virginia Tech University, 208 Hutcheson Hall, Blacksburg, Virginia 24060-0401 and Cornell University, 3M28 Martha Van Rensselaer Hall, Ithaca, New York 14853.     

Factor prices may be constant but factor returns are not

Welfare effects of a distortion introduced in a ‘small’ region, country or industry are not limited to allocations within that domain. They may be large, and undiminishing, even though the area considered is very close to satisfying the idealized prerequisites for partial equilibrium analysis.