An empirical examination of the benefits of international diversification

We examine the benefits of international portfolio diversification for U.K. investors between January 1985 and December 2000 using the approach of Wang [Wang, Z., 1998. Efficiency loss and constraints on portfolio holdings. Journal of Financial Economics 48, 359–375] and Li et al. [Li, K., Sarkar, A., Wang, Z., 2003. Diversification benefits of emerging markets subject to portfolio constraints. Journal of Empirical Finance 10, 57–80]. We find significant increases in the Sharpe [Sharpe, W.F., 1966. Mutual fund performance. Journal of Business 39, 119–138] and certainty equivalent return (CER) performance in moving from a domestic strategy to an international strategy that includes either global industry or country equity portfolios, even in the presence of short selling restrictions. We also find significant diversification benefits using U.K. unit trusts with international equity objectives. However, U.K. international unit trusts do not capture all the diversification benefits provided by either global industry or country equity portfolios.     

An examination of alternative CAPM-based models in UK stock returns

We evaluate the performance of unconditional and conditional versions of seven stochastic discount factor models in UK stock returns between January 1975 and December 2001. We find that the conditional four-moment capital asset pricing model (CAPM) has the best performance among the models we consider in terms of the lowest [Hansen, L.P., Jagannathan, R., 1997. Assessing specification errors in stochastic discount factor models. Journal of Finance 52, 591–607] distance measure and explaining the time-series predictability of industry portfolio excess returns. Conditional models also do a better job than unconditional models. However we find that the superior performance of the conditional four-moment CAPM, and conditional models in general, arises in part due to overfitting the data.     

Credibility of corporate announcements and market reaction: evidence from Canadian share repurchase programs

Do market participants evaluate the credibility of a firm's share repurchase announcement based on the firm's share repurchase history? Using a sample of 1,507 share repurchase programs for firms listed on the Toronto Stock Exchange from 1994 to 2005, we find that 69% of firms fail to acquire the target number of shares specified at announcement and many firms fail to repurchase any shares. We develop credibility indices and find a positive relationship between current announcement abnormal returns and completion credibility of previous announcements. We conclude that the market prices completion credibility of past share repurchase announcements in reacting to current repurchase announcements. Copyright © 2010 ASAC. Published by John Wiley & Sons, Ltd.     

An examination of predictable risk and return in UK stock returns

This paper examines whether conditional asset pricing models can explain the predictability in UK stock returns using the frameworks of Ferson and Harvey (1999) and Kirby (1998). The paper finds that the domestic Arbitrage Pricing Theory model is able to explain most of the observed time-series predictability in stock returns and tends to perform better than the domestic CAPM in explaining the predictability generated by the predictive instruments. The paper also finds that domestic asset pricing models tends to capture more of the time-series predictability in UK stock returns than international models. However none of the models are able to explain all of the predictability in returns.     

Consumer purchase behaviour of irradiated beef products: a simulated supermarket setting

In December 1997, the US Food and Drug Administration approved the use of irradiation to kill harmful bacteria in beef. As a result of limited information about consumers’ potential response to implementation of this technology, a supermarket simulation setting (SSS) test was conducted to assess consumer purchase behaviour. The objectives were to determine consumers’ willingness to purchase irradiated beef products when provided with information at the grocery store level and consumer's perceptions towards irradiated beef. Primary household grocery shoppers (n = 207) in Griffin, Georgia, USA who consumed beef at least twice per week participated in the study. Ground beef, ground chuck, top round steak and rib eye steak were displayed in refrigerated cases in either traditionally labelled packages (non‐irradiated) or in packages labelled as irradiated. Irradiated and non‐irradiated beef had the same unit price. Participants were instructed to purchase two packages of each cut on their first shopping trip; they then shopped a second time after an informative poster about irradiation had been placed in the display cases. The results indicated that irradiation information displayed on the poster at the point of purchase was effective in causing significant change in beef purchase behaviour. The information caused some consumers who had bought traditional packages initially to buy irradiated packages subsequently while others who bought irradiated packages initially subsequently bought traditional packages. Hence, the net effect of the information was minimal. A mean test across form/cut showed that consumers did not differentiate between the ground form and the muscle form in selecting irradiated packages.