Empirically Testing the Law of One Price in an International Commodity Market: A Rational Expectations Application to the Natural Rubber Market

The Law of One Price (LOP) is an important ingredient in theories of international trade and exchange rate determination. An important shortcoming of the existing empirical literature is that parity is typically assumed to hold contemporaneously. This overlooks the fact that international commodity arbitrage takes place over time as well as across spatially separated markets. Recognizing this fact, we expect to see parity holding for expected prices. A model which incorporates the expectations of commodity arbitragers is constructed and used to test the LOP in the natural rubber market. Results indicate that the inclusion of expectations may be of value when considering the LOP.     

Market Segment Response Through Field Experimentation

A key assumption underlying segmentation studies is that marketing efforts have differential effects on market segments. This question was investigated in the context of a field experiment involving enlistment in the armed forces. Approximately 8000 completed questionnaires administered at various stages in the US Navy enlistment recruiting process were collected at two points in time, corresponding to a pre- and post-experimental intervention. Attitudinal data were analysed to identify meaningful segments. Differential responses of market segments to advertising and recruiter changes were found, providing direction for evaluation of, and changes in, the creative component of advertising.     

Firm and Industry Effects of Advertising Accountancy Services

This article takes up the theme of the growing importance of the need to market financial and professional services by an examination of the case of accountancy services. Recent relaxations on the advertising of accountancy service call for an examitration of the appropriate marketing strategy for accounting firms. Discussion in the article indicates that firm size will have an important influence on the appropriateness of advertising and the form that it fakes. Advertising should form part of an integrated marketing strategy and not be seduced by the relaxation of the controls into focusing attention solely on this one aspect of marketing. As regards industry effects, advertising may be seen to reinforce concentration in the provision of both audit and particrtlarly non-audit services. There are benefits to smaller firms, however, through the use of advertising to emphasise specialist skills. In terms of conduct, advertising may help build up a barrier to entry into the provision of certain services, but is unlikely to replace price competition for the capture of audit clients as a key to the provision of non-audit services.